PURPOSE: To provide an automatic molten metal supplying device, which has a simple structure independent of a holding furnace and can easily supply molten metal in an accurate quantity.

CONSTITUTION: This device is composed of a refractory pusher chamber 2 for dipping into the molten metal, on which a cylindrical part 21 vertically held, a bottom chamber 22 integratively formed at the lower part of the cylindrical part 21 and dipped into the molten metal, a push-in block 25 liquid-tightly inserted into the cylindrical part 21 and supported so as to be vertically movable and an opening/closing valve 24 capable of tightly closing an opening part 23 for introducing the molten metal fitted on the bottom chamber 22 are provided, with a refractory molten metal dipping-out passage 3 communicated with the part below the bottom dead center of the push-in block 25 in the pusher chamber 2 and opened at the height higher than the dipped molten metal surface. Then molten metal quantity removed by lowering the push-in block 25 is pushed up to the dipping-out passage to supply the molten metal.