A balloon catheter is characterized by comprising: an expandable balloon (40) a hypotube (31) which extends in the longitudinal direction tube members (322, 323) which extend in the longitudinal direction, are connected to the proximal end side of the balloon (40) and to the distal end side of the hypotube (31), and are provided on the side surface thereof with a guide wire port (330) through which a guide wire (11) is inserted an inner tube (324) which has at least a part thereof disposed within the tube members (322, 323) at a position between the balloon (40) and the guide wire port (330) and which has an inner surface having a frictional coefficient lower than that of the tube members (322, 323) and a connection tube (325) which communicates with the inner tube (324), has the proximal side thereof disposed in the vicinity of the guide wire port (330), and has hardness lower than that of the tube members (322, 323).
