An ultrasound endoscope has a transducer unit 2 that has a top surface, a bottom surface and a side surface connecting the top surface and the bottom surface, and performs transmission and reception of ultrasound on a top surface side, a cable 4a that is for transmitting and receiving an electrical signal to and from the transducer unit 2 and is connected to the side surface, a conductive shield case 5 that has a lead-out port 17 for leading out the cable 4a, and a flexible extension portion 18 extended from at least the top surface side of the lead-out port 17, and covers the side surface and the bottom surface, and a housing 3 that holds a transducer unit 2 via the shield case 5, and has a cable insertion path 21 in which the cable 4a and the extension portion 18 are inserted.
