Patent ID: 8550394

Claim:
A webbing take-up device comprising: a spool to which a base end side, of a webbing belt having a long belt shape, in a longitudinal direction of the webbing belt is coupled, the spool taking up the webbing belt from the base end side in the longitudinal direction by rotating in a take-up direction to store the webbing belt thereon, the take-up direction being one direction about an axis of the spool; an adapter to which the spool is coupled directly or indirectly at one end side in an axial direction of the spool so as to rotate integrally with the spool; an insertion portion formed in the adapter and having an opening opened at an outer peripheral portion of the adapter, and wall portions facing each other in a direction orthogonal to both of a rotation axis direction of the adapter and a direction from a rotation center of the adapter to the opening, rotation of the adapter being regulated by a stopper, that is inserted from the opening into the insertion portion, interfering with the wall portions; and an urging member whose one end is coupled to the adapter, that urges the adapter in the take-up direction with an urging force, the urging force being increased by the adapter being rotated in a drawing-out direction opposite to the take-up direction, wherein a center between one of the wall portions and the other of the wall portions of the insertion portion is offset toward the take-up direction side with respect to a virtual line passing through the rotation center of the adapter and the opening of the insertion portion.