A tool bag carrying assembly comprising a supporting clip for clamping a tool bag to a mounting structure. The clip includes a first frame and a second frame that are pivotably connected to one another, such as by a friction hinge. The first frame can include a pair of sloped arms and a support bar. A rotatable cylinder can slide over the support bar and rotate freely about a transverse axis over the support bar, so as to reduce friction between tool bag and clip. The sloped arms can form an open segment that enables ingress and egress of the tool bag onto the rotatable cylinder. The second frame can include a pair of mount legs and a mount bar that slide into the mounting structure as the first frame presses against the mounting structure from an opposing side.