An ultrasound probe (100) includes: an ultrasound transmitting and receiving unit (101) configured to transmit ultrasound to a subject and receive an ultrasound echo reflected from the subject； an insulating portion (102) fixed on a distal end side of the ultrasound transmitting and receiving unit (101)； and a balloon locking portion (103) having a groove portion (104) for locking an opening end part of a balloon that covers the ultrasound transmitting and receiving unit (101), the balloon locking portion (103) being fixed on a distal end side of the insulating portion (102) and formed of a material harder than the insulating portion (102).
