Ultrasonic endoscope

An ultrasonic endoscope comprising:

• an ultrasonic transducer that has a plurality of ultrasonic vibrators;
• a distal end portion body that is disposed 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 one side in a first direction that is perpendicular to an axial direction of the distal end portion body or whose opening direction is a direction that has a component toward one side in the first direction and a component toward a distal end side in 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;
• an observation window which is disposed on the distal end portion body and through which a subject is observed;
• at least one signal cable connected to the plurality of ultrasonic vibrators;
• 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,
• wherein the distal end portion body comprises a cover that is removably attached to the cleaning communication hole.