PURPOSE: To automatically, surely and easily supply molten metal into an injection sleeve in a die casting machine under the condition of saving the energy and the space.

CONSTITUTION: A trough-type box body 2 being possible to close, is arranged between a trough 1 for supplying the molten metal and the injection sleeve 3. According to the pouring quantity from a weighing and pouring valve device 1 3 arranged at the tip part of the trough-type box body 2, the molten metal in the trough 1 for supplying the molten metal is supplied while automatically shifting into the trough-type box body 2 by siphon action of an inverse U shape tube 14 arranged between the front end part of the trough 1 for supplying the molten metal and the rear end part of the trough-type box body 2.