To provide an instrument capable of improving the state of crouching by one person alone when sleeping. SOLUTION: The band is looped at both ends, hooking the loop with the slip stopped on the crooked foot, pulling the other hand ring with the hand and stretching the Achilles tendon to relieve the pain. (FIG.【課題】一人寝の時に一人でこむら返り状態を改善できる器具を提供する。【解決手段】両端が輪になった帯であって、こむらがえりになった足にすべり止めのついた方の輪を引っ掛け、握りやすい方の輪を手で引っ張りアキレス腱を伸ばして、痛みを和らげる。【選択図】図2