Abstract: A utility support device for use in conjunction with hollow-rung ladders is provided which derives support from studs inserted into the hollow rungs of the ladder. The device is easily mounted to either side of the ladder for ease of access and convenience of the user. The device is suitable for supporting tools, materials and the like and may be easily relocated from one position on the ladder to another. The device is adjustable to accommodate different rung spacings, as well as to allow maintenance of substantially horizontal support through varying angles of inclination of the ladder.