The present invention relates to a catheter insertion device (1), comprising a hollow needle (9, 90), a catheter hub (5) in which a check valve (7) is arranged, and a catheter (4), which is in fluid communication with the catheter hub (5), wherein a support element (20) is attached at the catheter (4), and a flexible buffer element or flexible hose line (40) is provided between support element (20) and catheter hub (5), wherein a wire (91) is connected to the proximal end of the hollow needle (9, 90).
