A supporting frame for a golf bag including a seat having an enlarged portion and a flange at both sides of the enlarged portion, the flange being riveted on an upper portion of a golf bag, the enlarged portion having a recess at a bottom and between two shoulders, two blocks depending downwardly from a top surface of the recess and being each formed with an elongated slot, the recess having a rear side provided with a rail, a pair of legs each formed at an upper end with a horizontal portion having a threaded hole, each of the legs being fixedly connected with the seat by a bolt, a connecting member inserted into the rail of the seat and having two lugs between which is fitted an end of a spring, and a handle engaged with the connecting member by a pin extending through the two lugs of the connecting member and a partition of the locking handle whereby the legs will expand to support the golf bag at an upright position simply by pulling the handle outward.