The utility model relates to a massager which can effectively massage therapy parts from the side face of the waist to the side faces of the buttocks. The massager (1) is in a U shape and is provided with a main part (3) and a pair of extension parts (4), wherein the main part (3) is provided with a built-in driving part (2), and the extension parts (4) extend from the left end and the right end of the main part (3) in a supporting leg shape. According to the structure of the massager (1), the extension parts (4) approach each other or depart from each other in the width direction under the action of driving force of the driving part (2) so that the massager can squeeze and massage therapy objects located between the extension parts (4).本發明的按摩機能夠對腰部側面至臀部側面的施療部施加有效的按摩;本發明的按摩機(1)呈U字型形狀且具備內置有驅動部(2)的主體部(3)和從主體部(3)的左右方向兩端起呈支腳狀地延伸的一對延設部(4),該按摩機(1)構成為:一對延設部(4)在驅動部(2)的驅動力的作用下在寬度方向上相互靠近或遠離,從而能夠對位於一對延設部(4)之間的施療對象施加擠壓按摩。1‧‧‧按摩機2‧‧‧驅動部3‧‧‧主體部4‧‧‧延設部6‧‧‧後部殼體7‧‧‧旋轉軸8‧‧‧轉換部13L、13R‧‧‧左、右側的旋轉凸台部15L、15R‧‧‧左、右側的環狀嵌合部16L、16R‧‧‧左、右側的施療部件20‧‧‧施療體21‧‧‧保護部