Provided is a massage device that can easily change the shape of its thickness and has a smooth feel. A shaft material has a male thread portion. The tubular member 2 has a through hole along the length direction, and the shaft member 1 is passed through the through hole so as to be rotatable on the shaft member 1. Each diameter-expanding member 3 has a hole and a fitting portion 33, the outer diameter is larger than that of the tubular material 2, the shaft member 1 is passed through the hole, and the fitting portions 33 are spaced apart from each other. 2 is detachably fitted to each end portion. The cover 4 is cylindrical and has rubber elasticity, and is provided so as to detachably cover and hold each of the expanded diameter member 3 and the cylindrical member 2. Each long nut 5 is screwed to the male thread portion 11 of the shaft member 1. Each grip member 6 is provided so as to cover each long nut 5. [Selection] Figure 1【課題】太さ形状を容易に変えることができるとともに感触が滑らかなマッサージ器具を提供する。【解決手段】軸材１がおねじ部１１を有する。筒材２が長さ方向に沿った貫通孔を有し、貫通孔に軸材１を貫通させて軸材１に回転可能に設けられる。各拡径材３が孔と嵌合部３３とを有し、外径が筒材２より大径をなし、孔に軸材１を貫通させて嵌合部３３が互いに間隔をあけて筒材２の各端部と着脱可能に嵌合している。カバー４が筒状であってゴム弾性を有し、各拡径材３および筒材２を着脱可能に被覆して保持するよう設けられる。各長ナット５が軸材１のおねじ部１１とそれぞれ螺合している。各グリップ材６が各長ナット５をそれぞれ被覆するよう設けられている。【選択図】図１
