PURPOSE: To obtain a low pressure casting device of a wheel for vehicle preventing the bending of a rim part at the time of separating a cast product from a mold by forming a flow passage changing runner of molten metal in a side mold and enabling the separation of the flow passage changing part at the time of separating the side mold.

CONSTITUTION: After solidifying the molten metal in a cavity 50, one pair of side molds 30, 30 are separated from an upper and a lower molds. At this time, an L shaped runners (the solidification of molten metal) formed with the flow passage changing runners 31, 31 in the side molds 30, 30 are released from the side molds 30, 30. Thereafter, the upper mold 40 and an ejector pin 41 are held up together with the cast wheel by working an upper mold working tool 80 and the lower mold 20 is taken off by the gravity loaded to the cast product. In this condition, only the ejecting pin 91 is descended, and at the time of pushing the rim flange of the cast wheel with the tip part of the pin, the cast wheel is separated from the upper mold 40.