An ultrasonic transducer unit is provided in the tip of this ultrasonic endoscope. The ultrasonic transducer unit is configured from at least an ultrasonic transducer array and a first heat conduction member. In the ultrasonic transducer array, a plurality of ultrasonic transducers are arranged in a cylindrical shape. The first heat conduction member is provided so as to be in thermal contact with the ultrasonic transducer array. The ultrasonic endoscope is further provided with: a plurality of cables which are electrically connected to the ultrasonic transducer array； and an electrically conductive structure which is provided extending from the tip-end side of the ultrasonic endoscope towards the base-end side. The ultrasonic transducer unit and the electrically conductive structure are connected via an insulating second heat conduction member. Accordingly, provided is an ultrasonic endoscope provided with a heat dissipation structure with which electrical safety is ensured, and heat generated in the ultrasonic transducers is transferred to the electrically conductive endoscope structure accommodated inside the tip, and can be efficiently dissipated therefrom, said ultrasonic endoscope being capable of inhibiting increase in the heat of the surfaces of the ultrasonic transducers, and preventing digestive tract burns.L'endoscope à ultrasons selon l'invention comporte, sur une partie extrémité avant, une unité transducteur ultrasonore. Cette unité transducteur ultrasonore est formée au moins d'un ensemble de transducteurs ultrasonores et d'un premier élément thermoconducteur. L'ensemble de transducteurs ultrasonores comporte plusieurs transducteurs ultrasonores disposés de façon à former un cylindre et le premier élément thermoconducteur est en contact au niveau thermique avec l'ensemble de transducteurs ultrasonores. Cet endoscope à ultrasons comporte en outre plusieurs câbles connectés électriquement avec l'ensemble de transducteurs ultrasonores et une structure él
