An injection molded product ejection apparatus may simultaneously perform an operation in which a first-stage ejection device pushes up the internal portion of an injection molded product by a predetermined height from the surface of a lower mold and an operation in which a second-stage ejection device pushes up the external portions of the injection molded product by the predetermined height from the surface of the lower mold, to enable the injection molded product to be uniformly and stably ejected from the lower mold, and thereafter perform an operation in which the second-stage ejection device secondarily pushes up the external portions of the injection molded product from the surface of the lower mold, to enable a robot gripper to easily pick up the internal portion of the injection molded product and easily remove the injection molded product from the lower mold.