Abstract: A pin assembly adaptable for fastening to the exterior shoulder section of a garment for the detachable retention of a shoulder strap of a bag worn simultaneously with the garment. The assembly is formed of a U-shaped frame to the underside of which a pin is pivotaly mounted, with a hook fixed to the underside of the frame for retention of the end of the pin. A bar is pivotably mounted between the legs of the U-section frame to the frame, with detents on the legs serving to hold the bar in frictional engagement in the closed position of the bar between the frame legs. The bar is mounted at a spaced distance from each of the two frame legs to permit a shoulder strap of a bag to pass over the frame legs and under the bar when the assembly is pinned to the exterior of the shoulder section of a garment worn by the user.