Abstract: An injection apparatus includes a housing having an ampule provided with medication therein, a needle at one end and a sealing piston in the other end of the ampule, the ampule disposed in position in one part of the housing, the second part of the housing is provided with first means for moving the ampule so that the needle extends out from the housing and into a body against which the housing is positioned as the second part is moved relative to the first part and second means for moving the piston in the ampule to express the medication therefrom into the body upon further movement of the second housing part relative to the first housing part.