The invention relates to an injection device (2) comprising a carrier housing (4), in which an injection unit (8) having at least one injection liquid container (10) that can be pressed out can be inserted, and an actuating device (12), which can be driven along an injection direction (R) to activate the injection unit (8), wherein said actuating device comprises a piercing carriage (14), a receptacle (18) for the injection unit (8) and an injection carriage (16), which can be displaced relative to the piercing carriage (14), said injection carriage having an actuating plunger (48) for acting on a plunger (50) of the injection unit (8), wherein the piercing carriage (14) and the injection carriage (16) can be actuated by a force application means at least in order to carry out a piercing stroke and an injection stroke, and a piercing depth (tE) of the injection unit (8) can be set. For this purpose, the receptacle (18) is mounted on the piercing carriage (14) adjustably in the injection direction (R).
