Abstract: One of the side walls of a tray is provided with a stepladder side rail engaging bracket which includes opposed diverging channel members. Such channel members rest, without any fasteners or the like, upon the exposed upper edges of the side rails or stringers which form one side of the stepladder. The angle formed by the diverging channel members approximates the angle formed by the diverging front and rear side rails of the stepladder when in the open position. The tray may be compartmentalized to carry tools or parts; alternatively it may be partially or totally free of compartments to support paint cans or buckets for other uses.