PURPOSE: To provide a method for injection molding wherein the number of traces such as trace of a gate and traces of projections of ejector pins is reduced from the surface of an injection-molded item and the traces are made less noticeable than in conventional cases and to provide a molding machine thereof.

CONSTITUTION: An injection molding machine consists of a set of three molds and an ejector pin is provided on the same axial line as the axial line of a cavity and is movable in and out of the cavity. When a molded product is taken out, while at least the molded product in the cavity is left in the mold, part of plates are opened and molded items in a runner and a gate are taken out and after the runner molded item and the gate molded item are taken out, the molded product is ejected out of the mold by opening the mold and actuating the ejector pin in the gate.