A linear slide apparatus includes a straightly extending table guide, a table which is supported by one rail portion formed on an upper surface of the table guide and which can move in an axial direction thereof, and an electromagnetic actuator which drives the table. The electromagnetic actuator includes a first core portion, a second core portion, an exciting coil wound around the second core portion, and a moving body comprising a permanent magnet. The table guide made of magnetic material serves as the first core portion. The second core portion is fixedly mounted in the hollow hole of the table guide, and the moving body is accommodated therein movably in the axial direction.