Abstract: A casing for a seat-belt retractor comprises an additional flexible webbing guide sleeve through which the seat belt is pulled out. The sleeve is telescopically extendable and adjustably pivotable and bendable when the seat belt is pulled out. Therefore, the seat-belt retractor thus improved is usable with various models of cars, even if the direction in which the seat belt is pulled out changes. Since the housing and the sleeve are both made of a flexible plastic material, it is very easy to assemble these parts together by deforming appropriate portions thereof.