PURPOSE: To provide an injection mold, with which the blushing at the surface of a molded article is prevented from occurring due to poor venting or the gas leak at the hollow part of the molded article is prevented from developing by a method wherein the wall thickness of a cavity part or a cavity part, in which a gas channel is provided, can be easily controlled, and an injection- molded article.

CONSTITUTION: In an injection mold having a cavity 3 formed by a movable retainer plate 2 and a fixed retainer plate 1, some part 32 on the downstream side of a molten resin at the site 31, at which the flow direction and sectional shape of the molten resin in the cavity 3 change abruptly, is made of a movable block 4, which is moved forwardly in and backwardly from the cavity 3 by means of a shifting mechanism.