An object of the present invention is to reduce the time required for centering work and improve assembly work efficiency for a massage device when supporting a shaft that moves a jet part having a jet nozzle, and to reduce costs without hindering movement of the jet nozzle. This massage apparatus comprises: a rotary drive part (11); a shaft (9), one end (9a) of which is rotatably connected to the rotary drive part (11) and is supported by a bearing (27), and the other end (9b) of which extends in one direction inside a liquid tank (1); threaded gears (25A, 25B) disposed on the shaft (9); a jet part that is able to move along the shaft (9) with the threaded gears (25A, 25B), has a jet nozzle at the top, and can be rotated by the rotation of the threaded gears (25A, 25B); and a support mechanism that supports the other end (9b) of the shaft (9) in a non-fixed state.