An injection device (1) for injecting a fluid into an exhaust-gas treatment device (15), having an injector (2) which is positioned in an injector holder (3), wherein the injector (2) has a feed opening (4) and a component (5) of the injector holder (3) extends into the feed opening (4). An injection device (1) of this type is suitable, in particular, for feeding urea/water solution into the exhaust-gas treatment device (15) of a motor vehicle. The component (5) is preferably rigid in the longitudinal direction (23) and can be compressed in the radial direction (24) by way of a deformable rubber shell, in order to compensate for the volumetric expansion of the solution if it freezes.