PROBLEM TO BE SOLVED: To provide a catheter kit in which a guide wire and a catheter can be integrally operated.SOLUTION: The catheter kit 1 includes the catheter 10 having a proximal part 11, a distal part 12 and a lumen 13, and the guide wire 20 having a distal end part 21 and a rear end part 22. On the outer side face of the distal end part 21 of the guide wire 20, an enlarged diameter part 21b is formed. On the inner side face of the lumen 13 at the distal part 12, a distal side projection part 13b projected in the center axis direction of the lumen 13, a proximal side projection part 13c projected in the center axis direction of the lumen 13 and positioned on the side of the proximal part 11 from the distal side projection part 13b, and a housing part 13d formed between the distal side projection part 13b and the proximal side projection part 13c are formed.
