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