An ultrasonic endoscope includes an ultrasonic transducer that has an ultrasonic vibrator, a distal end portion body that is disposed continuously with a proximal end side of the ultrasonic transducer, an erecting base housing portion that is disposed in the distal end portion body and that has an opening whose opening direction is toward one side in a first direction that is perpendicular to the axial direction of the distal end portion body, a treatment tool lead-out port that communicates with an inside of the erecting base housing portion and from which a treatment tool is led out, an erecting base that is disposed in the inside of the erecting base housing portion and that changes a lead out direction of the treatment tool led out from the treatment tool lead-out port, and a cleaning communication hole that is formed in a wall surface on a side opposite to a side where the opening of the erecting base housing portion is disposed and that communicates with an outside.
