The invention provides a torque limiter, a plurality of wedge-shaped spaces are formed between inner and outer rings. In each wedge-shaped space, a first and a second roller are configured, and the first and the second roller transmit torque between the inner and outer rings by being brought into wedge-engagement when the inner and outer rings rotate relative to each other in one direction and in the other direction, respectively. Between the first and second rollers, an force application component is configured between the first and the second rollers, and the force application component applies forces on the first and second rollers in such directions that the first and second rollers are brought into wedge-engagement. Each wedge-shaped space is formed such that when the torque becomes equal to or higher than a predetermined value, a first wedge angle of the first roller or a second wedge angle of the second roller becomes such an angle that wedge-engagement of the roller is cancelled.