An injection device for use with a syringe having a syringe body, a needle coupled to the syringe body, and a plunger which can be moved through the syringe body to eject medication from the syringe through the needle. The injection device comprises a housing (1, 2) defining an inner space for holding a syringe and facilitating movement of the syringe from a first position in which the needle is contained fully within the housing and a second position in which the needle projects from the housing, and a drive member (51) located within said inner space so that in use the drive member can engage the plunger of a syringe held within the housing. The device further comprises a drive spring (43) located within said inner space for providing a force to the drive member so as to move the syringe from said first to said second position and thereafter to move the plunger through the syringe body, a trigger mechanism (33) for retaining the spring and the drive member in a cocked configuration and, upon activation, for releasing the spring and the drive member, and a damper (44-46) for damping the kinetic energy imparted by the drive member to the syringe plunger during all or a part of the movement of the syringe from said first to said second position.Linvention porte sur un dispositif dinjection destiné à être utilisé avec un seringue ayant un corps de seringue, une aiguille couplée au corps de seringue, et un piston qui peut se déplacer à travers le corps de seringue pour éjecter un médicament de la seringue par lintermédiaire de laiguille. Le dispositif dinjection comprend un boîtier (1, 2) définissant un espace interne destiné à contenir une seringue et à faciliter le déplacement de la seringue dune première position dans laquelle laiguille est contenue entièrement à lintérieur du boîtier et une seconde position dans laquelle laiguille fait saillie à partir du boîtier, et un élément dentraînement (521) situé à lintérieur dudit espace interne de sorte quen utilisation, l
