An injection apparatus is provided to prevent time delay from when injection material is injected into an injection mold to when vulcanization is carried out by heating from being delayed to reduce time required to perform the injection molding. An injection apparatus(1) includes an upper frame(10) and a lower frame(90). The upper frame includes an injection chamber(19) to receive injection material. An injection plunger(16) and a cylinder(13) to move the injection plunger up and down are installed to the upper side of the injection chamber. To a side of the upper frame, an injection material supplying device(45) is installed to communicate with a side of the injection chamber and to supply the injection material into the injection chamber. The injection material supplying device includes a feeding screw(48) to smoothly feed the injection material to the injection chamber. The injection chamber includes a nozzle(21). The nozzle has an end position in the injection chamber and the other end installed in an injection mold(70) disposed between the upper frame and the lower frame.
