Pulley, and window regulator comprising pulley

A pulley includes a main winding portion including an annular main winding groove, where a wire is windable, formed between a first flange and a second flange; and an auxiliary winding portion including an auxiliary winding groove, where the wire is windable, formed between the second flange and a third flange. The auxiliary winding groove includes a closest portion closest to the main winding groove in the radial direction thereof, and a curved portion curved toward the main winding groove in a portion adjacent to the closest portion so that the curved portion joins the main winding groove at the closest portion. The third flange includes an auxiliary guide portion extending in the radial direction of the auxiliary winding groove so that the groove depth of the curved portion becomes larger than that of the closest portion. This structure can provide a pulley allowing easy winding of a wire.