An injection device includes an elongated housing extending along a longitudinal axis, a piston rod to operably engage with a piston of a cartridge filled with the medicament, a dose tracker selectively operably engageable with the piston rod, wherein the dose tracker is longitudinally displaceable relative to the housing from an initial position in a proximal direction towards at least a first activation position for setting of the dose and wherein the dose tracker is longitudinally displaceable relative to the housing in a distal direction from the at least first activation position towards the initial position for dispensing of the dose, a spring to urge the dose tracker in the proximal direction relative to the housing, an interlock to lock the dose tracker in the initial position relative to the housing, and a release member to release the interlock.
