This creation provides a kind of tightening structure of massager, including a first band body and one second band body. The first band body includes plural engaging portion, those engaging portions are arranged along the extending direction of the first band body respectively, and each engaging portion includes two locating pieces. The second band body includes plural fitting portion, and extending direction of those fitting portions respectively along the second band body arranges, and each fitting portion includes two embedding holes. When the first band body is combined with the second band body, an at least engaging portion is embedded the corresponding fitting portion of what. Thereby, the breadth size of the visual user's hand of this creation adjusts its elasticity, makes this creation that massager to be tightened to the hand of the user of what any size.本創作提供一種按摩器之束緊結構,包括一第一帶體與一第二帶體。該第一帶體包括複數結合部,該些結合部分別沿該第一帶體之延伸方向排列,各結合部包括二定位塊。該第二帶體包括複數嵌合部,該些嵌合部分別沿該第二帶體之延伸方向排列,各嵌合部包括二嵌孔。該第一帶體與該第二帶體相結合時,至少一結合部嵌設於相對應之嵌合部。藉此,本創作可視使用者手部之幅寬大小調整其鬆緊度,使本創作將按摩器束緊於任何尺寸之使用者之手部。