An ultrasound endoscope includes: an insertion part including a distal-end rigid part, a curve part joined to a proximal end side of the distal-end rigid part, and a flexible tube part joined to a proximal end side of the curve part； an ultrasound transducer in which a plurality of piezoelectric elements capable of transmitting and receiving ultrasound are arranged annularly along a circumferential direction of the distal-end rigid part； an imaging sensor provided in the distal-end rigid part； an ultrasound cable including a plurality of coaxial cores that are electrically connected to the piezoelectric elements, respectively, and a metallic integration shield that covers the coaxial cores, the ultrasound cable being fixed to a proximal end side of the distal-end rigid part and on a side of an outer circumference； and a flexible substrate configured to electrically connect the piezoelectric elements and the coaxial cores to each other.
