diff --git a/supervisor/html/index.html b/supervisor/html/index.html
index 6c03918..8c9b808 100755
--- a/supervisor/html/index.html
+++ b/supervisor/html/index.html
@@ -746,7 +746,7 @@
                    .then(team => {
                        if (team.self_rogaining) {
                            // セルフロゲイニングの場合
-                           fetch(`${API_BASE_URL}/checkins/${zekkenNumber}/${eventCode}/`,{
+                           fetch(`${API_BASE_URL}/checkins/${zekkenNumber}/${encodeURIComponent(eventCode)}/`,{
                                     headers: {
                                             'Content-Type': 'application/json',
                                 }
@@ -917,7 +917,7 @@
                 
                 const [teamResponse, checkinsResponse] = await Promise.all([
                     fetch(`${API_BASE_URL}/team_info/${zekkenNumber}/`),
-		            fetch(`${API_BASE_URL}/checkins/${zekkenNumber}/${event_code}/`),
+		            fetch(`${API_BASE_URL}/checkins/${zekkenNumber}/${encodeURIComponent(event_code)}/`),
                 ]);
        
                 // 各レスポンスのステータスを個別にチェック