Abstract: A scaffold tool bucket holder for attaching and detaching to the side rail of a scaffold for supporting a bucket containing working materials and reduces or eliminates the risk of injury. The scaffold tool bucket holder comprises planar portion having a top surface and a bottom surface and an upwardly extending side wall along the peripheral of the top surface of the planar portion. The planar portion includes an opening adapted for receiving a bucket therein. Integrally formed along the back wall are attachment apparatus adapted to hook over a scaffold rail forming a frictional fit with the scaffold tray that is effective for maintaining the scaffold tool bucket holder in position on the scaffold rail.