A movable table apparatus includes a table in the form of a quadrilateral with four sides with two pairs perpendicular to each other, a pair of first fixed guide rails corresponding to the first pair of sides, and a pair of second movable guide rails corresponding to the second pair of sides. The table is adapted for movement in X and Y directions and is fabricated at a low overall height so that the apparatus may be lightweight and compact, thus requiring fewer parts and affording ready assembly. A work clamp support arm with a work clamp is rigidly mounted on a pair of the second and movable guide rails.