A massage chair includes a main seat portion; a backrest arranged at the rear of the main seat portion; and a seat surface length adjusting unit. The seat surface length adjusting unit includes an auxiliary seat portion extendible forwards from the main seat portion and a back-and-forth drive unit for moving the auxiliary seat portion forwards and backwards to change a front-to-back length of a seat surface. The massage chair further includes a footrest rotatably attached to the auxiliary seat portion, the footrest being movable forwards and backwards together with the auxiliary seat portion.
