PURPOSE: An injection device for prosthesis is provided to produce prosthesis which has high density and improve oral conformity.CONSTITUTION: An injection device for prosthesis comprises an air cylinder, a cylinder through which a material is injected, and a connector which is connected to a cylinder case. The air cylinder is connected to the cylinder case in a screw type. An injection line formed in an upper case is able to be immediately used by being sealed by a tape. A copper unit formed in a lower case applies heat to prosthesis.COPYRIGHT KIPO 2013본 발명은 의치상 주입시 지속적인 가압을 하고 석고 모형 하부에서 직접 열을 가 할 수 있다