To provide a casting apparatus in which the occurrence of a defective product caused by a wire-cutting of a grid body for lead battery can be prevented and which has less energy consumption.

In the casting apparatus composed of a mold 101 for forming the grid body, a molten metal pouring device 100 for pouring molten lead alloy 12 into the mold 101 and a lead melting furnace 1 for supplying the molten lead alloy 12 into the pouring device 100, the lead melting furnace 1 is composed of a box-type heat insulating vessel 10 having the upper part sealed with a cover 11. Then, the lead melting furnace 1 has a level sensor 4 and a lead charging tube 5, and the level sensor 4 detects the molten lead amount in the inner part, and the lead charging tube 5 supplies the lead alloy into the inner part.