A guide pulley support structure for a window regulator, for supporting a guide pulley on a perforated shaft member and a guide pulley bearing member, wherein a guide pulley support structure is obtained that is capable of securely linking the guide pulley bearing member and the perforated shaft member in a state in which the guide pulley is supported. In the guide pulley support structure for a window regulator, a groove is formed in one end surface of the perforated shaft member, a connecting edge formed by elastically deforming an internal peripheral edge of a punched hole punched in the guide pulley bearing member is caused to enter into the groove, and the perforated shaft member and the guide pulley bearing member are linked together.