PURPOSE: To make the workability safe and good by arranging an inner pressure adjusting means and a discharging part for charged molten metal in a molten metal carrying furnace body.

CONSTITUTION: In the molten metal carrying furnace body 2, a molten metal treating hole 1 for executing degassing, deoxidizing, etc., to the charged molten metal 16 is provided at the upper part, and a casting temp. holding means 3 for the charged molten metal 16 is arranged and a closed cover 4 is air-tightly attached to the molten metal treating hole 1. In the furnace body 2, a cleaning hole 5 used to a molten metal charging hole and the inner pressure adjusting means in the closed furnace body 2 are provided by utilizing an exothermic body inlet/outlet 9 and further, the discharging part 7 of the charged molten metal 16 according to variation of the inner pressure is arranged. By this method, as the molten metal charged into the molten metal carrying furnace body is carried in the closed condition, the safety is high, and as the surroundings of the furnace body do not become high temp., the general one is used for shifting means of crane, etc.