To provide a hydraulic massage apparatus capable of minimizing excessive bending of a flexible sheet, without hindering a massage effect. A movable platform (2) capable of moving in one side direction (1b) of a liquid tank (1) is disposed inside the liquid tank, and a spray part that sprays a spray liquid (B) toward an opening (1a) of the liquid tank (1) is disposed on the movable platform (2). A flexible sheet (5) covers at least part of the opening (1a) and is disposed in the liquid tank (1). A flexible reinforcing strip (6) is installed on the upper side of the flexible sheet (5) between both ends of the opening of the liquid tank (1) in a direction that intersects with the one side direction (1b). The flexible reinforcing strip (6) is disposed in a location that comes into contact with the buttocks of a person undergoing massage therapy when the person undergoing massage therapy gets on the flexible sheet (5).本發明提供一種能夠在不對按摩效果產生妨礙影響下抑制可撓性片材之過度撓曲之液壓按摩裝置。其解決手段為：於液槽1內，將移動台車2設置成可沿著液槽一邊方向1b移動，且於移動台車5設置朝向液槽1的開口1a噴射噴射液B之噴射部。以覆蓋開口1a的至少一部分之方式將可撓性片材5設置於液槽1。進一步地於可撓性片材5的上側，以沿著與一邊方向1b交叉之方向之方式將可撓性補強帶6架設於液槽1的開口兩端間。可撓性補強帶6，係設置於按摩受療者上下可撓性片材5時，按摩受療者的臀部所抵接之部位。
