Provided is an ultrasonic endoscope that can improve the ease of cleaning an erecting base and the surrounding part. An ultrasonic endoscope 1 includes an ultrasonic transducer 50 that has an ultrasonic vibrator, a distal end portion body 36 that is disposed continuously with a proximal end side of the ultrasonic transducer 50, an erecting base housing portion 62 that is disposed in the distal end portion body 36 and that has an opening 58 whose opening direction is toward one side in a first direction that is perpendicular to the axial direction of the distal end portion body 36, a treatment tool lead-out port 80 that communicates with an inside of the erecting base housing portion 62 and from which a treatment tool is led out, an erecting base 60 that is disposed in the inside of the erecting base housing portion 62 and that changes a lead out direction of the treatment tool led out from the treatment tool lead-out port 80, and a cleaning communication hole 84 that is formed in a wall surface on a side opposite to a side where the opening 58 of the erecting base housing portion 62 is disposed and that communicates with an outside.
