A hub (14) of a catheter (10) has a first tapered portion (34) in which an inner diameter is reduced toward a distal direction from a proximal opening portion (26), a second tapered portion (36) in which an inner diameter is reduced at a ratio greater than that of the first tapered portion (34) from a distal end of the first tapered portion (34) toward the distal direction, and a third tapered portion (38) in which an inner diameter is reduced at a ratio smaller than that of the second tapered portion (36) from a distal end of the second tapered portion (36) toward the distal direction.
