A massage device is disclosed, which includes a massage main body and a massage part. The massage part is used to press on user and moves reciprocally along a predetermined first axis with respect to the massage main body so as to stimulate a users body wherein the massage part is connected with a motor through a power transmission device, which includes a first shaft and a sliding member. The first shaft is driven by the motor to rotate and formed with an end-less spiral track. The sliding member is guided on the track of the first shaft by stopping rotation, and moves reciprocally along the first axis by the rotation of the first shaft. The track has a lead angle greater than 45 degrees with respect to the axis of the first shaft. The massage part is equipped on the sliding member.一種按摩裝置,係包含按摩本體及按摩部;該按摩部抵壓使用者,且藉由相對該按摩本體沿著預定之第一軸線往復移動,而對該使用者給予刺激;其中,該按摩部係由動力傳達裝置連結馬達;該動力傳達裝置係包含第一軸及滑動件,該第一軸係由該馬達旋轉驅動,且形成無端螺旋狀之軌道,該滑動件係藉由停止旋轉的導引在該第一軸之該軌道,且因該第一軸之旋轉而沿著該第一軸線進行往復移動;該軌道係相對該第一軸之軸線具有大於45°之導角;該按摩係設在該滑動件。1‧‧‧按摩裝置2‧‧‧按摩本體3‧‧‧按摩部4‧‧‧動力傳達裝置5‧‧‧第一馬達5a‧‧‧旋轉軸5b‧‧‧蝸桿齒輪6‧‧‧第一軸6a‧‧‧軌道9‧‧‧齒輪列11‧‧‧第一方向變換齒輪12‧‧‧第二方向變換齒輪13‧‧‧中間齒輪14‧‧‧單向離合器15‧‧‧最終齒輪25‧‧‧移動單元26‧‧‧殼套27‧‧‧第二馬達28‧‧‧導引軌道28a‧‧‧齒條29‧‧‧減速齒輪列30‧‧‧開關I‧‧‧凹部X‧‧‧第一軸線Y‧‧‧第二軸線
