diff --git a/src/pages/agent-office/AgentOffice.css b/src/pages/agent-office/AgentOffice.css
index eebd63d..ab40f58 100644
--- a/src/pages/agent-office/AgentOffice.css
+++ b/src/pages/agent-office/AgentOffice.css
@@ -195,6 +195,11 @@
   font-size: 11px;
   color: #94a3b8;
 }
+.ao-sidepanel-actions {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+}
 .ao-sidepanel-close {
   background: none;
   border: none;
@@ -204,6 +209,18 @@
   padding: 0 4px;
 }
 .ao-sidepanel-close:hover { color: #fff; }
+/* 전체 화면 토글 — 모바일 전용 (데스크톱에서는 숨김) */
+.ao-sidepanel-expand {
+  display: none;
+  background: none;
+  border: none;
+  color: #888;
+  font-size: 18px;
+  cursor: pointer;
+  padding: 0 4px;
+  line-height: 1;
+}
+.ao-sidepanel-expand:hover { color: #fff; }
 
 /* Tabs */
 .ao-sidepanel-tabs {
@@ -377,19 +394,31 @@
     bottom: 0;
     left: 0;
     right: 0;
+    top: auto;
     width: 100%;
+    height: 55vh;
     max-height: 55vh;
     border-left: none;
     border-top: 1px solid #333;
     border-radius: 16px 16px 0 0;
     animation: slideUp 0.25s ease-out;
     z-index: 100;
+    transition: height 0.25s ease, max-height 0.25s ease, border-radius 0.25s ease;
+  }
+  /* 전체 화면으로 확장 */
+  .ao-sidepanel.expanded {
+    top: 0;
+    height: 100dvh;
+    max-height: 100dvh;
+    border-radius: 0;
+    border-top: none;
   }
   @keyframes slideUp {
     from { transform: translateY(100%); }
     to { transform: translateY(0); }
   }
 
+  .ao-sidepanel-expand { display: inline-block; }
   .ao-sidepanel-header { padding: 8px 12px; }
   .ao-sidepanel-header::before {
     content: '';
diff --git a/src/pages/agent-office/assets/agent_music.webp b/src/pages/agent-office/assets/agent_music.webp
index 2852da6..10dbab9 100644
Binary files a/src/pages/agent-office/assets/agent_music.webp and b/src/pages/agent-office/assets/agent_music.webp differ
diff --git a/src/pages/agent-office/components/SidePanel.jsx b/src/pages/agent-office/components/SidePanel.jsx
index e8ddaa5..af6e943 100644
--- a/src/pages/agent-office/components/SidePanel.jsx
+++ b/src/pages/agent-office/components/SidePanel.jsx
@@ -10,6 +10,7 @@ const TABS = ['Commands', 'Tasks', 'Tokens', 'Logs'];
 
 export default function SidePanel({ agentId, agentState, pendingTask, onClose, refreshTrigger }) {
   const [activeTab, setActiveTab] = useState('Commands');
+  const [expanded, setExpanded] = useState(false);
   const meta = AGENT_META[agentId];
   if (!meta) return null;
 
@@ -18,7 +19,7 @@ export default function SidePanel({ agentId, agentState, pendingTask, onClose, r
     : agentState?.state || 'unknown';
 
   return (
-    <div className="ao-sidepanel">
+    <div className={`ao-sidepanel${expanded ? ' expanded' : ''}`}>
       <div className="ao-sidepanel-header">
         <div className="ao-sidepanel-agent">
           <div className="ao-sidepanel-icon" style={{ borderColor: meta.color }}>
@@ -29,7 +30,17 @@ export default function SidePanel({ agentId, agentState, pendingTask, onClose, r
             <div className="ao-sidepanel-state">● {stateText}</div>
           </div>
         </div>
-        <button className="ao-sidepanel-close" onClick={onClose}>×</button>
+        <div className="ao-sidepanel-actions">
+          <button
+            className="ao-sidepanel-expand"
+            onClick={() => setExpanded(e => !e)}
+            aria-label={expanded ? '축소' : '전체 화면'}
+            title={expanded ? '축소' : '전체 화면'}
+          >
+            {expanded ? '⤡' : '⤢'}
+          </button>
+          <button className="ao-sidepanel-close" onClick={onClose}>×</button>
+        </div>
       </div>
 
       <div className="ao-sidepanel-tabs">