The invention relates to a massage device, in particular to a massage device for relieving shoulder fatigue. Therefore, the technical problem is to provide the massage device capable of comprehensively massaging and relieving shoulder fatigue, wherein the massage device can be used for massaging at any time. According to the technical scheme, the massage device comprises a mounting seat, a first clamping plate, a small sliding rail, a small sliding block, a second clamping plate, a spring and the like; the right side of the bottom of the mounting seat is provided with the first clamping plate,the left side of the lower part of the mounting seat is provided with the small sliding rail, the small sliding block is slidably arranged on the small sliding rail, and the bottom of the small sliding block is connected with the second clamping plate. By arranging the small sliding rail, people can move the second clamping plate leftwards or rightwards, so that the position of the massage devicecan be adjusted according to the widths of different chair backs, which facilitates the massage of people, by arranging a screw rod, when a motor rotates, the screw rod can be driven to move so as todrive a moving frame to move, and finally, a large massage ball moves to contact with the shoulders of people so as to achieve the massage purpose.