Injection molding apparatus, molding method, a molded article, and an optical element

To provide an injection molding apparatus capable of preventing a distortion or the like of the molded article during molding, to injecting a resin through a gate GA into cavity CV formed by the fixed mold 61 and movable mold 62 by an injection molding apparatus 100 for molding an optical element, characterized by arranging the gate GA below the center of the cavity CV. Accordingly, the main filling direction of the resin by placing the gate GA below the molded article MP becomes gate GA on direction, it is possible to prevent the occurrence of the distortion of the gate GA lower. Further, a state in which the resin supplied from the gate GA is injected into resin injected earlier, since the occurrence of air entrainment can be suppressed, curing inhibition by oxygen is reduced, and can be cured in a short time.