An injection device defines a longitudinal center axis, a proximal direction and a distal direction. The injection device includes a housing having a receptacle for an injection fluid vessel and an operator-manipulated element configured to be rotatable to set an amount of injection fluid to be dispensed. The operator-manipulated element is further configured to move relative to the housing in the direction of the center axis in the distal direction when rotated. The operator-manipulated element further is displaceable in the proximal direction to dispense injection fluid. A feed part is connected to the operator-manipulated element in a rotatably fixed manner and is displaced in the direction of the center axis in the distal direction during the setting of the amount of injection fluid to be dispensed. The feed part is connected to the housing in a rotatably fixed manner and is displaced in the direction of the center axis in the distal direction when the injection fluid is dispensed. A blocking contour extends around the center axis in a spiral-like manner and coacts with the feed part and to block a movement of the feed part in the direction of the center axis in the proximal direction. The blocking contour has at least at one location an interruption configured to allow a movement of the feed part in the direction of the center axis in the proximal direction.
