An injection device for injecting a fluid into an organism, in particular a human or animal body, which can comprise a fluid providing section including a container for storing the fluid and a supply means for supplying the fluid. The fluid injecting section for injecting the fluid provided by the fluid providing section into the organism includes a catheter means and is characterized by the fluid injecting section being provided with a pressure recognition arrangement which can be located close to and/or in the catheter means for detecting a pressure increase and/or a pressure loss.