Provided are: an ultrasonic oscillator unit which can be small sized and which is suitable for use in an ultrasonic endoscope, the ultrasonic oscillator unit having a wiring structure having good workability during wiring of electrodes of an ultrasonic oscillator array and numerous cables and low difficulty of the operation process thereof, and whereby a load on a cable is not prone to occur and there is little danger of disconnection； and an ultrasonic endoscope which uses the ultrasonic oscillator unit. The ultrasonic oscillator unit has: an ultrasonic oscillator array in which a plurality of ultrasonic oscillators are arranged； an electrode part having a plurality of electrodes conducting with the plurality of ultrasonic oscillators, respectively, the electrode part being provided to an end surface side of the ultrasonic oscillator array； a backing material layer having an outer surface which is arc-shaped in cross section and being provided with a recess on the inside thereof on a reverse side from the outer surface thereof, the backing material layer being provided on a back surface of the ultrasonic oscillator array； a wiring substrate having a plurality of wirings electrically connected to the plurality of electrodes of the electrode part； and a cable wiring part in which a plurality of cables connected to the plurality of wirings, respectively, are wired and connected； at least a portion of the cable wiring part being included in the recess in the backing material layer. The ultrasonic endoscope is provided with the ultrasonic oscillator unit.La présente invention décrit : une unité d'oscillateur à ultrasons qui peut être de petit calibre et qui convient pour l'utilisation dans un endoscope à ultrasons, l'unité d'oscillateur à ultrasons présentant une structure de câblage présentant une bonne aptitude au façonnage durant le câblage des électrodes d'un réseau d'oscillateurs à ultrasons et de nombreux câbles et peu de difficulté de son procédé de fonctionnemen
