An injection device includes a housing (10, 16) for receiving a cartridge or syringe (18), a plunger (50) moveable axially to express a dose from the cartridge or syringe, a rotary drive element (22) configured to rotate as the plunger moves axially, a clutch member (38) moveable between a holding position, in which it inhibits rotary movement of the rotary drive element (22), and a release position, in which the rotary drive element is freed to rotate to cause or allow the plunger (50) to move axially wherein the clutch member (38) is selectively moveable to a control position to control rotary movement of the rotary drive element and thereby axial movement of the plunger, and bias element (94) for urging the clutch member to its control position.
