An ultrasound endoscope includes an objective optical system 13, an illumination optical system 14, a distal end portion 111, an ultrasound transducer portion 30, a distal end cover 1, a through-hole 5h formed in the distal end cover 1, a conductor wire portion 31, and a conductor wire portion passing portion 5k formed in the distal end cover 1, the conductor wire portion passing portion forming a region where the conductor wire portion 31 passes from the through-hole 5h to an outside of the distal end cover member 1 when the ultrasound transducer portion 30 is detached from the distal end portion 111.
