Abstract: A belt pulley decoupler for a motor vehicle drive train, having a hub, a traction pulley having a traction-means receiving contour and being accommodated to rotate about an axis of rotation relative to the hub. The decoupler may include a plurality of bow springs supporting the traction pulley relative to the hub in a direction of rotation, at least one first bow spring being arranged offset in an axial direction and/or a radial direction of the axis of rotation to a second bow spring acting parallel to the first bow spring, and a vibration damping device conjointly connected by means of a carrier to the hub and accommodated on a sleeve-like receiving region of the carrier. The receiving region of the carrier projecting in the axial direction, at least partially, beyond the torque transfer region of the traction pulley.