A relaxation device (10) includes a body supporting means (13) that supports a user's body. The body supporting means (13) includes a seat (30) and a backrest (31), which is arranged at a rear part of the seat. A rocking driving means (12) is controlled by a controlling means (24) and rocks the body supporting means (13) in at least one direction. A speaker (34) is arranged in the backrest (31) of the body supporting means. The body supporting means (13) includes a depression (40) formed to be deeper at an inner side than an outer side of the body supporting means relative to a widthwise direction. A sound output direction of the speaker (34) is tilted toward a center of the body supporting means in the widthwise direction.