Provided is a damper for absorbing a rotational variation, the damper having improved torque transmission ability and vibration damping performance, which are achieved without increasing the size of the damper. This damper for absorbing a rotational variation is provided with: a hub (10); a pulley body (31) disposed so as to be coaxial with and rotatable relative to the hub (10); and coupling rubber (32) for connecting the hub (10) side and the pulley body (31) side so that the hub (10) and the pulley body (31) can be circumferentially displaced relative to each other. The hub (10) has a plurality of first projections (15) provided at predetermined circumferential intervals. The pulley body (31) has a plurality of second projections (36) provided at predetermined circumferential intervals so as to be located between the first projections (15). The coupling rubber (32) has formed thereon buffer sections (321) located between the first projections (15) and the second projections (36). When the amount of relative circumferential displacement between the hub (10) and the pulley body (31) is greater than or equal to a predetermined value, the first projections (15) and the second projections (36) are in contact with the buffer sections (321) from both circumferential sides.