A carpenter's tool holder to be supported from a wearer's waist belt and including a pocket for supporting and containing therein a tape rule device and a retention member connected within the pocket for interlocking engagement with the spring clip member attached to the rear surface of the tape rule device for preventing unintentioned dislodgment of the tape rule device from the pocket. A second embodiment includes below the pocket an elongated hanger member pivotally connected to the tool holder for supporting and containing a hammer and wherein the elongated hanger member has at its free end a tool loop defining therein an opening through which the handle of the hammer is inserted.