The utility model relates to an outdoor shared massage chair which comprises a base, a rack and a backrest seat, the rack comprises a lower frame and an upper frame, the lower frame is rotatably connected with the upper frame, a ceiling is mounted at the top of the upper frame, and the ceiling, the rack and the base are buckled to form a box body; the backrest seat comprises a lower backrest and an upper backrest, the lower backrest is mounted on the lower frame, and the lower backrest is rotatably connected with the upper backrest. The outdoor shared massage chair is simple in structure, therack section is divided into the lower frame and the upper frame, the lower frame is rotationally connected with the upper frame, and when the massage chair needs to be used, a user can drive the upper frame to rotate and drive the upper backrest to rotate through manual or mechanical driving, and the upper frame abuts against the lower frame to form a straight rack for people to enjoy; the upperrack and the lower rack abut against the upper guide rail and the lower guide rail, so that the spine massager can penetrate through the bent position to move up and down from the hip position of thehuman body to the head position of the human body.