An injection apparatus includes a heating cylinder having a nozzle for injecting resin material, a drop-port block that supports the heating cylinder, an injection stage extending so as to be orthogonal to the lengthwise axis of the heating cylinder while supporting the drop-port block, and a pair of injection-apparatus moving mechanisms that moves the heating cylinder. The drop-port block is provided with a supporting stage extending in the direction orthogonal to the lengthwise axis, and the injection-apparatus moving mechanism is connected to the supporting stage and to a stationary mount which supports a stationary mold. The supporting plate extends alongside the injection stage with a clearance therebetween so that deformation of the supporting stage when the nozzle is pressed into contact with the stationary mold is not transmitted to the injection stage.