Abstract: A movable floor mechanism (10) is adapted for placement in the bed of a truck. The mechanism includes a frame (12, 14, 16), a movable floor (26) encircling the frame, a motor (24) attached to the frame, and at least one sprocket (22) attached to the motor, the sprocket engaging the movable floor. The frame is made from a pair of longitudinal beams (12), a plurality of lateral beams (14) attached between the longitudinal beams, and at least one guide rail (16) attached to the lateral beams. The movable floor (26) is made from a plurality of interengaged floor elements (26a, 26b). Each of the floor elements is made from a central portion, a connector, and a receptor, wherein the receptor is configured to accept the connector of an adjacent floor element. The receptor contains an axial slot (52) and the connector contains a pin receiving hole (56). When two floor elements are engaged the axial slot of the first floor element and pin receiving hole of the second floor element align to receive a pin (54).