An injection mold for molding a product having at least one bar formed at one side thereof. The injection mold includes a stationary mold including an inclined pillar and a movable mold including a movable core and a sliding block mounted on a top thereof. The inclined pillar inserted in the sliding block to drive the sliding block to slide towards or away from the movable core. A shaping cavity for molding the product is formed among the movable core, the sliding block and the stationary mold. The end surface of the sliding block further defines at least one shaping groove connected with the shaping cavity for molding the bar. The movable mold further includes an ejector pin and a maintaining pillar. The maintaining pillar resists against a bottom of the sliding block to avoid the ejector pin moving upward before the bar completely parted from the shaping groove.