An injection apparatus (1) for making an injection at a predetermined depth in skin comprises: a first skin positioning member (4, 26); a second skin positioning member (3, 54), wherein the first and second skin positioning members lie or are moveable to lie in an injection arrangement; an injection needle (50); and means guiding the injection needle for movement from a parking position above the skin, through the lower surface of the second skin positioning member to slide beneath the first skin positioning member to an injection position. A further injection apparatus comprises: an injection needle; a plunger (44) within the injection needle; and means for retracting the injection needle such that material to be injected is expelled from the injection needle by the plunger.