diff --git a/app/modules/project/templates/project/inbox.html b/app/modules/project/templates/project/inbox.html
index 74bddda..6219431 100644
--- a/app/modules/project/templates/project/inbox.html
+++ b/app/modules/project/templates/project/inbox.html
@@ -1,7 +1,7 @@
 {% extends "erp_base.html" %}
 
 {% block head_extra %}
-<link rel="stylesheet" href="/static/project.css?v=20260918c" />
+<link rel="stylesheet" href="/static/project.css?v=20260918d" />
 <link rel="stylesheet" href="/static/vendor/material-symbols/material-symbols.css" />
 {% endblock %}
 
@@ -45,5 +45,5 @@
   {% endif %}
 </div>
 
-<script src="/static/project.js?v=20260918c" defer></script>
+<script src="/static/project.js?v=20260918d" defer></script>
 {% endblock %}
diff --git a/app/modules/project/templates/project/index.html b/app/modules/project/templates/project/index.html
index bfad721..f7eb47d 100644
--- a/app/modules/project/templates/project/index.html
+++ b/app/modules/project/templates/project/index.html
@@ -1,7 +1,7 @@
 {% extends "erp_base.html" %}
 
 {% block head_extra %}
-<link rel="stylesheet" href="/static/project.css?v=20260918c" />
+<link rel="stylesheet" href="/static/project.css?v=20260918d" />
 <link rel="stylesheet" href="/static/vendor/material-symbols/material-symbols.css" />
 {% endblock %}
 
@@ -428,5 +428,5 @@
   window.PJ_COLORS = {{ ["#4573d2","#37a3a3","#62a420","#e8a33d","#e8384f","#aa62e3","#f06a6a","#5a6772"] | tojson }};
   window.PJ_STAGE_COLORS = {{ ["#4573d2","#37a3a3","#62a420","#e8a33d","#e8384f","#aa62e3","#f06a6a","#5a6772","#e8398a","#a15c43"] | tojson }};
 </script>
-<script src="/static/project.js?v=20260918c" defer></script>
+<script src="/static/project.js?v=20260918d" defer></script>
 {% endblock %}
diff --git a/app/modules/project/templates/project/project.html b/app/modules/project/templates/project/project.html
index aa8d770..c6ecf04 100644
--- a/app/modules/project/templates/project/project.html
+++ b/app/modules/project/templates/project/project.html
@@ -1,7 +1,7 @@
 {% extends "erp_base.html" %}
 
 {% block head_extra %}
-<link rel="stylesheet" href="/static/project.css?v=20260918c" />
+<link rel="stylesheet" href="/static/project.css?v=20260918d" />
 <!-- 구글 머티리얼 심볼(담당자 아이콘 등) — self-host -->
 <link rel="stylesheet" href="/static/vendor/material-symbols/material-symbols.css" />
 <!-- 타임라인 vis-timeline — self-host -->
@@ -36,9 +36,7 @@
           <button type="button" class="pj-icon-btn" id="pj-new-project-side" title="새 프로젝트">+</button>
           {% endif %}
         </div>
-        {% if nav_projects %}
-        <ul class="pj-tree" id="pj-tree-root">
-          {% for p in nav_projects %}
+        {% macro nav_li(p) %}
           <li class="pj-tree-li" data-id="{{ p.id }}"
               data-name="{{ p.name }}" data-desc="{{ p.description or '' }}"
               data-start="{{ p.start_date or '' }}" data-due="{{ p.due_date or '' }}"
@@ -57,11 +55,22 @@
               {% endif %}
             </div>
           </li>
-          {% endfor %}
+        {% endmacro %}
+        {% set nav_active = nav_projects | rejectattr("status", "equalto", "completed") | list %}
+        {% set nav_done = nav_projects | selectattr("status", "equalto", "completed") | list %}
+        {% if nav_active %}
+        <ul class="pj-tree" id="pj-tree-root">
+          {% for p in nav_active %}{{ nav_li(p) }}{% endfor %}
         </ul>
         {% else %}
         <div class="pj-empty-sm">프로젝트 없음</div>
         {% endif %}
+        {% if nav_done %}
+        <div class="pj-side-head pj-side-head-done"><span>완료 프로젝트</span></div>
+        <ul class="pj-tree" id="pj-tree-root-done">
+          {% for p in nav_done %}{{ nav_li(p) }}{% endfor %}
+        </ul>
+        {% endif %}
       </div>
 
       <div class="pj-side-block">
@@ -544,5 +553,5 @@
 </script>
 
 <script src="/static/vendor/vis-timeline/vis-timeline-graph2d.min.js"></script>
-<script src="/static/project.js?v=20260918c" defer></script>
+<script src="/static/project.js?v=20260918d" defer></script>
 {% endblock %}
diff --git a/app/static/project.css b/app/static/project.css
index 9b50b70..4f769b9 100644
--- a/app/static/project.css
+++ b/app/static/project.css
@@ -216,6 +216,9 @@
 
 .pj-side-block { margin-bottom: 22px; }
 .pj-side-head { display: flex; align-items: center; justify-content: space-between; font-size: 14px; font-weight: 800; color: #6b7280; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 8px; }
+.pj-side-head-done { margin-top: 14px; }
+#pj-tree-root-done .pj-tree-avatar,
+#pj-tree-root-done .pj-tree-name { opacity: .6; }
 /* 굵게 지정해도 연한 회색 + 12px 라서 눈에 잘 안 띄었음 — 텍스트만 진한
    잉크색으로 대비를 올린다("+" 버튼은 원래 색 유지). */
 .pj-side-head span { color: var(--pj-ink); }
diff --git a/app/static/project.js b/app/static/project.js
index 2512a6c..540cbe0 100644
--- a/app/static/project.js
+++ b/app/static/project.js
@@ -3338,8 +3338,35 @@
     function renderTree() {
       const rootUl = el("pj-tree-root");
       if (!rootUl) return;
-      rootUl.innerHTML = projectsMeta.map(treeProjLi).join("");
+      const active = projectsMeta.filter(function (p) { return p.status !== "completed"; });
+      const done = projectsMeta.filter(function (p) { return p.status === "completed"; });
+      rootUl.innerHTML = active.map(treeProjLi).join("");
       wireTreeHandlers(rootUl);
+
+      // "완료 프로젝트" 섹션 — 처음 페이지를 열었을 때 완료 프로젝트가
+      // 하나도 없었으면 서버가 아예 안 그려서 DOM에 없다. 완료로 바뀌는
+      // 순간 필요해지면 그때 만든다(반대로 마지막 하나가 해제/삭제되면 통째로 치운다).
+      let doneUl = el("pj-tree-root-done");
+      if (done.length) {
+        if (!doneUl) {
+          const block = rootUl.closest(".pj-side-block");
+          const head = document.createElement("div");
+          head.className = "pj-side-head pj-side-head-done";
+          head.innerHTML = "<span>완료 프로젝트</span>";
+          doneUl = document.createElement("ul");
+          doneUl.className = "pj-tree";
+          doneUl.id = "pj-tree-root-done";
+          block.appendChild(head);
+          block.appendChild(doneUl);
+          wireTreeDrag(doneUl);
+        }
+        doneUl.innerHTML = done.map(treeProjLi).join("");
+        wireTreeHandlers(doneUl);
+      } else if (doneUl) {
+        const head = doneUl.previousElementSibling;
+        if (head && head.classList.contains("pj-side-head-done")) head.remove();
+        doneUl.remove();
+      }
     }
     // 좌측 프로젝트 목록 드래그 순서 변경 — 홈 화면 카드 정렬과 같은 API/원칙
     // (관리자 전용, 최상위 프로젝트만). rootUl 자체는 renderTree() 가 innerHTML
@@ -3398,6 +3425,7 @@
     }
     renderTree();
     wireTreeDrag(el("pj-tree-root"));
+    wireTreeDrag(el("pj-tree-root-done"));
 
     // 새 최상위 프로젝트 (관리자)
     const newProjSide = el("pj-new-project-side");