An injection device comprising: a base member (102) a plunger (104) for driving a piston in a distal direction a driving member (106) and a gear mechanism (108) providing a gearing between the driving member (106) and the plunger (104) such that then the driving member (106) is moved at a first speed relative to the base member (102), the plunger (104) is moved at a second speed relative to the base member (102) wherein at least two of the base member (102), the plunger (104) and the driving member (106) are pivotally connected to the gear mechanism (108).