diff --git a/ble.pp b/ble.pp
index 703cd486..74eab39f 100644
--- a/ble.pp
+++ b/ble.pp
@@ -859,7 +859,6 @@ function ble/init/clean-up {
     ble/base/restore-builtin-wrappers
     builtin eval -- "$_ble_bash_FUNCNEST_restore"
   fi
-  builtin unset -v _ble_bash
   return "$ext"
 }
 
@@ -1006,6 +1005,7 @@ function ble/base/read-blesh-arguments {
 if ! ble/base/read-blesh-arguments "$@"; then
   builtin echo "ble.sh: cancel initialization." >&2
   ble/init/clean-up 2>/dev/null # set -x 対策 #D0930
+  builtin unset -v _ble_bash
   return 2 2>/dev/null || builtin exit 2
 fi
 
@@ -1014,6 +1014,7 @@ function ble/base/read-blesh-arguments {
   if ! ble/base/unload-for-reload; then
     builtin echo "ble.sh: an old version of ble.sh seems to be already loaded." >&2
     ble/init/clean-up 2>/dev/null # set -x 対策 #D0930
+    builtin unset -v _ble_bash
     return 1 2>/dev/null || builtin exit 1
   fi
 fi
diff --git a/docs/ChangeLog.md b/docs/ChangeLog.md
index 1d7afd90..df51d9dd 100644
--- a/docs/ChangeLog.md
+++ b/docs/ChangeLog.md
@@ -117,6 +117,7 @@
 - edit: fix standard streams in `EXIT` trap with `ble/widget/exit` `#D2217` 89f0dab8
 - util(`ble/fd#cloexec`): check `fdflags` compatibility to avoid crash `#D2227` c3b3aaf8
 - util(`ble/function#evaldef`): suppress alias expansions (reported by 103sbavert) `#D2240` 51e762fe
+  - main: fix a bug that `_ble_bash` is missing (reported by tessus) `#D2242` xxxxxxxx
 
 ## Compatibility
 
diff --git a/note.txt b/note.txt
index 20a686fa..2e8da591 100644
--- a/note.txt
+++ b/note.txt
@@ -7394,6 +7394,15 @@ bash_tips
 
 2024-07-29
 
+  * BUG main: _ble_bash が消失している (reported by tessus) [#D2242]
+    https://github.com/akinomyoga/ble.sh/issues/470#issuecomment-2255357001
+    Ref. #D2240
+
+    これは #D2240 の regression. _ble_bash の位置を前方に移動した時に builtin
+    unset -v _ble_bash を途中失敗に付加したが、全体で実行する ble/init/clean-up
+    にも付加していた事によって全体で _ble_bash が unset される様になってしまっ
+    ていた。これは問題だ。急いで修正する。
+
   * main: --clear-cache で長々しい devel version では遅い warning を出力する必要はあるのか [#D2241]
     Ref. #D2222