Molten pig iron manufacturing method

A molten pig iron manufacturing method using a fixed-type DC electric furnace, wherein

• if, in a furnace, a space in which a horizontal separation distance from an outer periphery of an upper electrode at a height position between a slag bath surface and a lower end of the upper electrode inserted from a furnace lid is 0.5 times or less a diameter of the upper electrode is defined as an upper electrode facing space, and
• if, in the furnace, a space in which a horizontal separation distance from an inner wall surface of a furnace wall at a height position above a height position of the slag bath surface is within the shortest distance between the furnace wall and the upper electrode facing space is defined as a furnace inner peripheral wall space,
• an auxiliary raw material is supplied to the fixed-type DC electric furnace and molten pig iron having a C concentration of 2 to 4 mass % at a temperature of 1400° C. to 1550° C. is tapped from a tap hole in a state in which a solid iron source is present in the furnace inner peripheral wall space and in a state in which the solid iron source is not present in the upper electrode facing space.