Seat belt retractor

A seat belt retractor, having a belt reel 1 for a seat belt webbing (2) and a load limiter (3) which has a flowable load-limiter medium (16) that is transported through a flow channel, by a displacement device (4) drivable by the belt reel (1), at an energy consumption related to a crash, in which the flow resistance of the transported load-limiter medium (16) in the flow channel (30) or the volume of the load-limiter medium (16) transported in the flow channel (30) per unit time is adjustable.