To provide an equipment to carry the molten metal in a condition without entrainment of the air and molten metal surface oxidation and to improve accuracy of fixed carrier quantity of the molten metal.

This equipment consists of a pump plunger 4 and a hydraulic servo cylinder 5 and the stroke quantity S of the pump plunger 4 is controlled by the hydraulic servo cylinder 5 with good accuracy. The pump plunger 4 advances and retreats in a molten metal supply sleeve 3 which is established in the casting 2 and by the advance movement a molten metal inhalation mouth 3a is blocked and the molten metal M in a molten metal supply sleeve 3 is spewed from a molten metal outlet 2b. Also by retreat movement the molten metal inhalation mouth 3a is opened and the pump plunger 4 allows inhalation of the molten metal M of a molten metal accumulation department 2c to the molten metal supply sleeve 3. A hydraulic servo cylinder 5 connects a cylinder rod 6 with the pump plunger 4 via a connecting rod 7 equipped outside of the casing 2 and drives the same pump plunger 4 and the cylinder rod 6 integrally.