A work table includes a workpiece-supporting box having a bottom plate formed with an outlet port connected to a suctioning device, and a peripheral wall. Left and right guide plates extend inclinedly and downwardly from the peripheral wall toward the outlet port, and have opposing end walls distal from the peripheral wall. A distributor member is disposed between the end walls, and cooperates with the bottom plate to define a lower chamber in fluid communication with the outlet port, and further cooperates with the guide plates and the peripheral wall to define an upper chamber. A working panel is mounted on the peripheral wall, and is formed with apertures for access to the upper chamber.