Catheter insertion device

Catheter insertion device, comprising: a catheter sleeve approximately cylindrical hollow (2) at whose distal end a catheter is attached (4); a sleeve needle (8) having a hollow needle (9) fixed thereon and extending in the ready position through the catheter sleeve (2) and the catheter (4); a check valve (7) through which the hollow needle (9) extends in the ready position and which automatically closes after the needle is removed; and a protection element of the needle (13) arranged displaceably on the needle (9) and engaging with the needle near the needle tip when the hollow needle is withdrawn from the catheter sleeve (2); characterized by an actuating valve (10) movably guided in the sleeve catheter (2) and disposed proximally relative to the check valve (7) and arranged on the sleeve catheter (2) and having a cylindrical hollow space for receiving the needle (9); in which the protection element of the needle (13) is arranged in the cylindrical hollow space of the actuating valve (10) and has a coupling section which engages a coupling means (10f) provided in the inner circumference of the actuating valve (10) when the hollow needle (9) is removed from the catheter sleeve (2).