Abstract: The invention relates to a catheter device (1) for percutaneous interventions, in particular for injections, biopsies or the like, with an outer catheter (2) and with a tool for the intervention, in particular an injection needle (3), biopsy forceps, electrodes or the like, at the proximal end (4) of the catheter device (1). To be able to perform a percutaneous intervention free of injury, the tool is received in the outer catheter (2) in the delivery state, and the tip of the tool is recessed in the outer catheter (2) in the delivery state or aligned with the proximal end of the outer catheter (2), and the tool can be moved relative to the outer catheter (2) in such a way that at least the tip of the tool protrudes past the proximal end (4) of the outer catheter (2) in the state of engagement.