PROBLEM TO BE SOLVED: To provide an automatic lower back and buttock massage machine which can be set on a sitting structure body such as a chair and massage the lower back and buttock parts by natural body motion when a subject only sits on the machine doing nothing without occupying time and space in daily life and can be used for a long time.SOLUTION: At least one subject support member capable of massaging the lower back and buttock parts of a subject is disposed on a chair frame body part.COPYRIGHT: (C)2008,JPO&INPIT【課題】椅子など腰掛構造体に装備し、被験者は何もせずに腰かけるだけで腰かけた時の自然の体の動きで腰臀部を揉み解すことができ、日常生活の中で時間や場所を取らず、永続して使える自働腰臀揉み器を提供する。【解決手段】腰掛枠体部に被験者の腰臀部を揉み解し可能な被験者支持部材を少なくとも1本設けたことを特徴とする。【選択図】図1