The present invention is a massage chair, having frame body (2) with specific curve, a chair back (21) located by the chair seat (22), wherein the chair back (21) is adjusted properly by the chair seat (22) for rotating and having a rotation angle； wherein the frame body (2) including back section (13), buttock section (14) and leg section (15), the buttock section (14) has a downward curve and the leg section (15) has an upward curve, thus, massage module (3) can provide massage service to human thigh when the rotation angle is more than 110 degree. Figure 4
