Abstract: A contractor's caddy system for use in cooperation with a truck. A caddy retainer is securable to a truck floorboard area forward of the front seat at a location readily accessible to the driver. A caddy is detachably held by the retainer and comprises a box-like structure with a bottom wall, a flat top wall, and vertical walls providing a front wall, a rear wall and first and second side walls. The top wall is recessed and shaped to provide a series of vertical compartments, including some deep ones that extend down nearly to the bottom wall and some that are shallow. There may also be a set of drawers in one side wall, which lie below the shallow compartments and extend short of the deep compartments. Some compartments may be rectangular in horizontal cross-section, while others may be circular in cross-section. One round, shallow compartment may be provided with an annular shelf near its upper end. There may be also a central handle for carrying the caddy.