An injection device has a drive unit 12, a syringe holding unit 10 and includes an injection complete indicator sleeve 20 which includes its own bias spring 50 and which is latched into a retracted position (figure 7d) as the injection device is cocked. Upon firing the injection device, the injection complete indicator is kept in its retracted position until towards the end of the forward stroke of the drive mechanism, whereupon the injection complete indicator is unlatched and shoots forwardly under the influence of the bias to impact an abutment collar 66 to generate an audible or tactile indication along with the visual indication of the sleeve being visible through a window 18 in the cover 14. Operation of the device initiated by trigger 16. The drive unit may be reset by using the nose of the syringe holding unit to compress the drive spring (54, figure 2).
