An ultrasonic probe includes a surface continuous portion which includes a perpendicular plane perpendicular to a longitudinal axis, and which is provided in a state that a distal end of an outer peripheral portion is an outer edge with a surface thereof being continuous, the surface continuous portion producing cavitation when ultrasonic vibrations in vibration directions parallel to the longitudinal axis are transmitted to the surface continuous portion. The ultrasonic probe includes a suction opening which is located apart from the surface continuous portion, configured to produce the cavitation, toward a proximal direction, and which is extended inward from the outer peripheral portion, the suction opening suctioning a shattered object shattered by the cavitation.
