Balloon catheter

Abstract

Provided is a balloon catheter that has improved torque transmission properties and enables a guide wire to slide preferably.　This balloon catheter comprises: a shaft (10) which has an inner cavity (100) that includes a second lumen (120) and a first lumen (110) through which a guide wire (50) is passed; a balloon which is disposed at a distal portion of the shaft (10); and a tube (20) which is provided to the second lumen (120). The first lumen (110) and the second lumen (120) are connected with each other in a cross-section perpendicular to the longitudinal axis. The outer wall of the tube (20) is in abutment with the wall of the second lumen (120). The first lumen (110) does not encompass the center (P1) of the shaft (10). The shaft (10) has restriction parts (40) that restrict the tube (20) so as not to move from the second lumen (120) to the first lumen (110).