Injection device

An injection device which is provided for injection of an injectable substance with a syringe into an organism, comprising:

• a holding unit, which is adapted to hold the syringe;
• an actuating unit, which is adapted for dosed injection of the injectable substance and which is removably coupled to the holding unit and couplable with a plunger of the syringe when the holding unit holds the syringe, preferably wherein the actuating unit comprises a lever and a piston, wherein a displacement of the lever from a first position to a second position results in a movement of the piston along its longitudinal axis, wherein the actuating unit is adapted to transfer the movement at least partly to the plunger of the syringe when the syringe is coupled with the actuating unit;
• a needle guide that is adapted to be removably couplable with an injection needle, and that is adapted for changing the injection position of the injection needle;
• and
• a connection structure which connects the holding unit and the needle guide.