[Problem] There is provided a medical instrument that includes a first tube body and a second tube body which have different rigidity from each other, in which it is possible to prevent a coating layer in a level difference portion, which is formed between the tube bodies, from being broken. [Means for Resolution] A level difference portion 150 is formed between an inner peripheral surface of the distal end opening portion 121a of a second tube body 120 and an inner peripheral surface 110b of a first tube body 110, and a thickness d1 of a part 163 of a coating layer 160, which covers the level difference portion, is formed to be larger than a thickness d2 of the level difference portion.
