An injection device mounting plate for a mold is used to mount, on the mold, an in-line screw type injection device provided with a fixation frame and a plasticization screw shaft rotatable and movable with respect to the fixation frame, and comprises: a lateral surface on which the fixation frame of the in-line screw type injection device can be fixedly installed; and a hot runner which opens inthe lateral surface and is capable of accommodating the plasticization screw shaft. The hot runner is capable of plasticizing and measuring resin material in cooperation with the plasticization screwshaft of the in-line screw type injection device and is capable of allowing the plasticized resin material to flow toward a cavity of the mold.