diff --git a/apps/as/src/entities/elapr/model/elapr-forkjoin-types.ts b/apps/as/src/entities/elapr/model/elapr-forkjoin-types.ts
index 766ca3675..584a28c43 100644
--- a/apps/as/src/entities/elapr/model/elapr-forkjoin-types.ts
+++ b/apps/as/src/entities/elapr/model/elapr-forkjoin-types.ts
@@ -17,7 +17,7 @@ export type AtrzSeComCd =
   | "ATRZ02" // 검토 (실무 기술검토)
   | "ATRZ03" // 승인 (부서 승인 / 병합에 회신)
   | "ATRZ04" // 병합 (정책총괄 AI 병합의견 종합 심의 - 10-12 신설)
-  | "ATRZ99"; // 최종승인(회신) (환경청에 최종 회신)
+  | "ATRZ99"; // 최종승인(회신) (환경청에 회신)
 
 /** 브랜치 구분코드 */
 export type BranchSeCd = "MAIN" | "PIPE" | "FACILITY" | "TOTAL_AGG";
diff --git a/apps/as/src/entities/elapr/ui/elapr-approval-dialog.tsx b/apps/as/src/entities/elapr/ui/elapr-approval-dialog.tsx
index e38b8e961..9e8751b63 100644
--- a/apps/as/src/entities/elapr/ui/elapr-approval-dialog.tsx
+++ b/apps/as/src/entities/elapr/ui/elapr-approval-dialog.tsx
@@ -123,7 +123,7 @@ function ElaprApprovalDialog({
 
   const approveButtonLabel = useMemo(() => {
     if (!isForkJoin) return "결재";
-    if (branchSeCd === "TOTAL_AGG" && isLastInBranch) return "결재 (환경청에 최종회신)";
+    if (branchSeCd === "TOTAL_AGG" && isLastInBranch) return "결재 (환경청에 회신)";
     if (branchSeCd === "TOTAL_AGG") return "결재 (병합)";
     if ((branchSeCd === "PIPE" || branchSeCd === "FACILITY") && isLastInBranch)
       return "결재 (병합에 회신)";
diff --git a/apps/as/src/entities/elapr/ui/elapr-doc-prgrs-forkjoin-step.tsx b/apps/as/src/entities/elapr/ui/elapr-doc-prgrs-forkjoin-step.tsx
index 571e56668..7620d008f 100644
--- a/apps/as/src/entities/elapr/ui/elapr-doc-prgrs-forkjoin-step.tsx
+++ b/apps/as/src/entities/elapr/ui/elapr-doc-prgrs-forkjoin-step.tsx
@@ -200,7 +200,7 @@ export function ElaprDocPrgrsForkJoinStep({ steps }: ElaprDocPrgrsForkJoinStepPr
           </div>
         </div>
 
-        {/* Stage 3: 정책총괄부 종합취합 및 환경청 최종회신 트랙 */}
+        {/* Stage 3: 정책총괄부 종합취합 및 환경청 회신 트랙 */}
         <div className="flex flex-1 flex-col gap-4 rounded-xl border border-purple-100 bg-purple-50/40 p-4">
           <div className="flex items-center gap-2 border-b border-purple-200/60 pb-2">
             <CheckCircle2 className="size-5 text-purple-600" />
diff --git a/apps/as/src/entities/elapr/ui/elapr-forkjoin-picker-grid.tsx b/apps/as/src/entities/elapr/ui/elapr-forkjoin-picker-grid.tsx
index 7aa92cde0..6f7428b4c 100644
--- a/apps/as/src/entities/elapr/ui/elapr-forkjoin-picker-grid.tsx
+++ b/apps/as/src/entities/elapr/ui/elapr-forkjoin-picker-grid.tsx
@@ -58,7 +58,7 @@ const TRACK_CONFIGS: TrackConfig[] = [
     key: "TOTAL_AGG",
     label: "정책부 종합병합",
     defaultDeptNm: "정책총괄부",
-    guideText: "ℹ️ 두 부서(관로+시설) Join 완료 후 정책취합 및 환경청 최종회신 단계로 진행됩니다.",
+    guideText: "ℹ️ 두 부서(관로+시설) Join 완료 후 정책취합 및 환경청 회신 단계로 진행됩니다.",
     minCount: 2,
     maxCount: 5,
   },
@@ -107,7 +107,7 @@ export function ElaprForkJoinPickerGrid({
     ],
     TOTAL_AGG: [
       createDefaultRow("TOTAL_AGG", "정책총괄부", 1, "ATRZ04"), // 병합 (10-12 신설)
-      createDefaultRow("TOTAL_AGG", "정책총괄부", 2, "ATRZ99"), // 최종승인/전결 (환경청 최종회신)
+      createDefaultRow("TOTAL_AGG", "정책총괄부", 2, "ATRZ99"), // 최종승인/전결 (환경청 회신)
     ],
   }));
 
diff --git a/apps/as/src/pages/fnrs-cnsltn/lib/button-config.ts b/apps/as/src/pages/fnrs-cnsltn/lib/button-config.ts
index 243f72b27..d72503d1c 100644
--- a/apps/as/src/pages/fnrs-cnsltn/lib/button-config.ts
+++ b/apps/as/src/pages/fnrs-cnsltn/lib/button-config.ts
@@ -188,16 +188,149 @@ const ROLE_USER01_ATRZ_STATUS_ACTIONS: Record<
   },
 };
 
+/**
+ * Fork-Join (병렬 결재 6인 체제: 관로2 + 시설2 + 정책병합2) 전용 상태별 버튼 액션 매핑
+ * - Stage 2: 관로/시설 실무검토자(ATRZ02), 부서승인자(ATRZ03)
+ * - Stage 3: 정책총괄 종합병합자(ATRZ04), 최종회신자(ATRZ99)
+ * - 일반 순차 결재 라인과 분리하여 독립적으로 관리
+ */
+const ROLE_USER01_FORK_JOIN_ATRZ_STATUS_ACTIONS: Record<
+  string,
+  Record<string, FnrsCnsltnViewButtonAction[]>
+> = {
+  ER: {
+    ATRZ01: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.fileSplmnt,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.fileVrfc,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.dsgntRvwr,
+    ],
+  },
+  SL: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  TE: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocCrt,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.rvwRsltInq,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.rvwStrg,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.rvwCmptn,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.dmndSplmnt,
+    ],
+    ATRZ03: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzAprv,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzRply,
+    ],
+    ATRZ04: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.rvwRsltInq,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzAprv,
+    ],
+    ATRZ99: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzRply,
+    ],
+  },
+  TP: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  RB: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  RA: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  AV: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  EV: {
+    ATRZ01: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.dsgntRvwr,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.costVrfc,
+    ],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  RK: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.rvwCmptn,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.dmndSplmnt,
+    ],
+    ATRZ03: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzAprv,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzRply,
+    ],
+    ATRZ04: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzAprv,
+    ],
+    ATRZ99: [
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng,
+      FNRS_CNSLTN_VIEW_BUTTON_ACTION.atrzRply,
+    ],
+  },
+  RR: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  EP: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+  TA: {
+    ATRZ01: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ02: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ03: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ04: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+    ATRZ99: [FNRS_CNSLTN_VIEW_BUTTON_ACTION.pwrkCnsltnDocMng],
+  },
+};
+
 function resolveButtonConfigs(actions: FnrsCnsltnViewButtonAction[]): FnrsCnsltnViewButtonAction[] {
   return actions.map((action) => FNRS_CNSLTN_VIEW_BUTTON_ACTION[action]);
 }
 
-interface GetButtonConfigsOptions {
+export interface GetButtonConfigsOptions {
   hasPendingApprovalRequest?: boolean;
   hasCompletedDraft?: boolean;
   canRetryFileVrfc?: boolean;
   canRetryDraftGen?: boolean;
   canRetryCostVrfc?: boolean;
+  isForkJoin?: boolean;
 }
 
 const PENDING_APPROVAL_ACTIONS = new Set<FnrsCnsltnViewButtonAction>([
@@ -214,7 +347,9 @@ function resolveRoleUser01AtrzButtonActions(
   atrzSeComCdList: string[],
   options?: GetButtonConfigsOptions,
 ): FnrsCnsltnViewButtonAction[] {
-  const atrzStatusMap = ROLE_USER01_ATRZ_STATUS_ACTIONS[prgrsSttsComCd];
+  const atrzStatusMap = options?.isForkJoin
+    ? ROLE_USER01_FORK_JOIN_ATRZ_STATUS_ACTIONS[prgrsSttsComCd]
+    : ROLE_USER01_ATRZ_STATUS_ACTIONS[prgrsSttsComCd];
   if (!atrzStatusMap || atrzSeComCdList.length === 0) return [];
 
   const seen = new Set<FnrsCnsltnViewButtonAction>();
diff --git a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
index 28f23264d..90b27befa 100644
--- a/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
+++ b/apps/as/src/pages/fnrs-cnsltn/ui/components/floating-action-buttons.tsx
@@ -194,6 +194,15 @@ function FloatingActionButtons({
   const normalizedTaskSeComCd = normalizeTaskSeComCdForElapr(data.detDto?.taskSeComCd);
   const isForkJoin = isForkJoinTask(data.detDto?.taskSeComCd);
 
+  const effectiveAtrzSeComCdList = useMemo(() => {
+    if (isForkJoin && userPendingAtrzSeComCd) {
+      if (!atrzSeComCdList.includes(userPendingAtrzSeComCd)) {
+        return [...atrzSeComCdList, userPendingAtrzSeComCd];
+      }
+    }
+    return atrzSeComCdList;
+  }, [atrzSeComCdList, isForkJoin, userPendingAtrzSeComCd]);
+
   const viewOnlyPwrkCnsltnDoc =
     prgrsSttsComCd === "SL" ||
     (prgrsSttsComCd === "RB" && dtlInstCd !== "ROLE_USER05") ||
@@ -204,23 +213,25 @@ function FloatingActionButtons({
     if (needsElaprPrgrsCheck && isElaprDocPrgrsLoading) return [];
     if (needsPwrkDraftCheck && isPwrkCnsltnLoading) return [];
     if (needsAiAutoLatest && isAiAutoLatestLoading) return [];
-    return getButtonConfigs(dtlInstCd, prgrsSttsComCd, atrzSeComCdList, {
+    return getButtonConfigs(dtlInstCd, prgrsSttsComCd, effectiveAtrzSeComCdList, {
       hasPendingApprovalRequest: needsElaprPrgrsCheck ? hasPendingApprovalRequest : undefined,
       hasCompletedDraft: needsPwrkDraftCheck ? hasCompletedDraft : undefined,
       canRetryFileVrfc: needsAiAutoLatest ? canRetryFileVrfc : undefined,
       canRetryDraftGen: needsAiAutoLatest ? canRetryDraftGen : undefined,
       canRetryCostVrfc: needsAiAutoLatest ? canRetryCostVrfc : undefined,
+      isForkJoin,
     });
   }, [
-    atrzSeComCdList,
     canRetryCostVrfc,
     canRetryDraftGen,
     canRetryFileVrfc,
     dtlInstCd,
+    effectiveAtrzSeComCdList,
     hasCompletedDraft,
     hasPendingApprovalRequest,
     isAiAutoLatestLoading,
     isElaprDocPrgrsLoading,
+    isForkJoin,
     isPwrkCnsltnLoading,
     isRvwLoginUserLoading,
     needsAiAutoLatest,
@@ -234,7 +245,7 @@ function FloatingActionButtons({
     isRegister && actionButtons.some((button) => button === FNRS_CNSLTN_VIEW_BUTTON_ACTION.strg);
   const canDmndSplmntInPwrkCnsltnDoc =
     prgrsSttsComCd === "RK" &&
-    atrzSeComCdList.includes("ATRZ02") &&
+    effectiveAtrzSeComCdList.includes("ATRZ02") &&
     actionButtons.some((button) => button === FNRS_CNSLTN_VIEW_BUTTON_ACTION.dmndSplmnt);
 
   function handleGoToList() {
@@ -817,7 +828,7 @@ function FloatingActionButtons({
                 >
                   {isForkJoin
                     ? userPendingBranchSeCd === "TOTAL_AGG"
-                      ? "결재 (환경청에 최종회신)"
+                      ? "결재 (환경청에 회신)"
                       : "결재 (병합에 회신)"
                     : "결재(회신)"}
                 </Button>
@@ -877,7 +888,7 @@ function FloatingActionButtons({
           <PwrkCnsltnDocMngDialog
             open={activeDialog === "pwrkCnsltnDocMng"}
             fnrsCnsltnDocNo={docNo}
-            atrzSeComCdList={atrzSeComCdList}
+            atrzSeComCdList={effectiveAtrzSeComCdList}
             prgrsSttsComCd={prgrsSttsComCd}
             canSave={
               (needsElaprPrgrsCheck && !hasPendingApprovalRequest) || viewOnlyPwrkCnsltnDoc