PROBLEM TO BE SOLVED: To provide a massage device for seat capable of suppressing the attenuation of a force of a pressing part to press a seating person.SOLUTION: A massage device 1 for seat comprises: a pressing part 10 for pressing a seating person 3 by inflation； an adjustment part 30 which adjusts the position of the pressing part 10 between the seating person 3 and a seat 2； an angle detection part 80 for detecting the deformation of the seat 2 due to the inflation of the pressing part 10； and a control part 70 for controlling the adjustment part 30 on the basis of a result of the detection by the angle detection part 80.SELECTED DRAWING: Figure 2【課題】押圧部が着座者を押圧する力の減衰を抑制できるシート用マッサージ装置を提供する。【解決手段】シート用マッサージ装置１は、膨張することで着座者３を押圧する押圧部１０と、前記着座者３とシート２との間において、前記押圧部１０の位置を調整する調整部３０と、前記押圧部１０の膨張による前記シート２の変形を検出する角度検出部８０と、前記角度検出部８０の検出結果に基づいて、前記調整部３０を制御する制御部７０と、を備える。【選択図】図２
