NOVELTY - An electromagnetic casting apparatus comprises electroconductive bottomless cooling crucible (7) positioned in chamber (1) and where silicon raw material (11) is thrown, induction coil (8) surrounding crucible for dissolving silicon raw material by electromagnetic induction heating, monitoring window (15) in the side wall of chamber, and heat-resistant tube (17) provided directly under crucible over casting surface vicinity of silicon ingot (3). Molten silicon (12) is pulled down from crucible and solidified, and continuous casting of silicon ingot (3) is performed.    USE - An electromagnetic casting apparatus for silicon ingot (claimed) used as raw material of substrate for solar cells.    ADVANTAGE - Heat-resistant board becomes red-hot by radiant heat from casting surface of ingot without blocking approach of silicon (Si) fume existing in heat-resistant tube, and temperature variation on casting surface of ingot is correctly monitored.    DETAILED DESCRIPTION - An electromagnetic casting apparatus comprises electroconductive bottomless cooling crucible (7) positioned in chamber (1) and where silicon raw material (11) is thrown, induction coil (8) surrounding crucible for dissolving silicon raw material by electromagnetic induction heating, monitoring window (15) in the side wall of chamber, and heat-resistant tube (17) provided directly under crucible over casting surface vicinity of silicon ingot (3). Molten silicon (12) is pulled down from crucible and solidified, and continuous casting of silicon ingot (3) is performed. End surface at the side of silicon ingot of heat-resistant tube is obstructed with heat-resistant board (18), temperature of heat-resistant board is measured through the inside of heat-resistant tube with radiation thermometer (16) positioned to exterior of monitoring window, and variation of casting surface temperature of silicon ingot is monitored based on measured temperature of heat-resistant board.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional diagram of an electromagnetic casting apparatus.    Chamber (1)    Silicon ingot (3)    Bottomless cooling crucible (7)    Induction coil (8)    Silicon raw material (11)