A sun shade apparatus of the present invention having a cable provided so as to be capable of being forced out or drawn in, a connector connecting the cable and a curtain to each other, a guide rail provided on a window portion, and a slide member attached to the curtain and slidable on the guide rail. The curtain is stretched with the operation for forcing out or drawing in the cable. The guide rail has a bracket for fixing the guide rail on a vehicle door panel. One end of the bracket is engaged with a flange portion of the door panel, while the other end is fixed on the door panel by a fixing member.