To improve the connectional molten metal supplying unit using a ladle by solving such problems as temperature fall and spill of molten metal while carried, measuring inaccuracy of molten metal to be supplied, and no lid to cover a furnace.

This unit for supplying the molten metal is provided with a take-in cylinder 25 of the molten metal used to soak a lower half degree into the molten metal 73 by passing through the lid 75 of the melting metal furnace 71, by inserted the measuring ladler 31 of an upper level side into this cylinder 25, and to pass the measuring ladler 35 of a lower level side through this. The molten metal 73 is measured by being made to flow from a flow-in hole 25b of the molten metal into measuring space 81 formed between the measuring ladler 31 of the upper level side and this level side by lowering the measuring ladler 25 of the lower level side, after both the upper and lower ladlers 31, 35 are lifted synchronously as they are, the molten metal is supplied to a mold from a molten metal supplying hole 25a by lifting up the measuring ladler 35 on the lower level side. Without any decrease in the temperature of the ladled molten metal, the measurement of the molten metal is carried out accurately, without any anxiety about the overflow of the ladle molten metal, excellent qualitative molten metal in the deep place in the melting metal furnace can be ladled up, no obstruction is caused in ladling even though a top face of the melting metal furnace is closed.