The present invention provides a catheter device. This novel catheter device comprises: a catheter, a catheter sheath, a guide wire, a tapered head, a helical structure, and a rotary member. When the catheter is inserted through a blood vessel and stopped by a plaque, it is able to operate the rotary member to rotate the catheter, such that a blockage region of the plaque for the catheter is formed with a through hole therein. Therefore, the guide wire can pass through the through hole of the blockage region, and then the front-end of the catheter can subsequently pass through the blockage region with the forward movement of the guide wire. Consequently, a balloon angioplasty or a stent implantation can easily be conducted in the blockage region of the artery.
