The balloon catheter (10) is provided with a balloon (20) on the tip of a main shaft (14). The balloon catheter (10) is provided with: protruding parts (32, 34) that are furnished on the outer surface of the balloon (20) and protrude outward from the outer surface of the balloon (20) at least when the balloon (20) is expanded； and electrodes (22, 24) that are furnished on the leading edges of the protruding parts (32, 34) in the direction of protrusion and are capable of transmitting energy to living tissue. The leading edge electrodes (22, 24) can thereby be delivered near the desired site of treatment by thrusting the protruding parts (32, 34) into living tissue and, in this configuration, energy is transmitted to said treatment site.
