Abstract: Provided is a vehicle seat that includes a dynamic damper having desired properties, and that makes it possible to improve a mass holding angle and to reduce cost. A vehicle seat (1) includes: a frame (11a, 12a, 13a); a case (20) attached to the frame (11a, 12a, 13a); and a dynamic damper (30) that is housed in the case (20) and that includes a mass (40) and an elastic body (50). The elastic body (50) includes at least an annular elastic body (51) as a member having a through hole. The mass (40) is fitted to the through hole of the annular elastic body (51), and the outer peripheral surface of the annular elastic body (51) is disposed in contact with the inner wall of the case (20).