A rehabilitation device for treating carpal tunnel syndrome and tennis elbow is disclosed. The rehabilitation device includes upper and lower members clamping a wrist from above and below. An upper bulge element and a lower bulge element are correspondingly positioned in the middle of the inner faces of the upper and lower members, respectively, for pressing against a gap between the ulna and radius of the wrist from above and below. The upper member has two positioning elements on the inner face to the lateral sides of the upper bulge element. A strap wraps around outer faces of the upper and lower members so as to tight the upper and lower members on the wrist from above and below. By swinging the palm up and down, the bulge elements press into the gap and provide massage and relaxation to the ligament inside.
