The present invention relates to an ultrasonic cartridge capable of performing uniform scanning even by two-axis control, thereby improving obesity treatment performance, and an ultrasonic treatment head using the same. The ultrasonic treatment head (10) according to the present invention comprises a head body (100) and a cartridge (200) which is attached to and detached from the head body (100). The head body (100) comprises: a body housing for supporting and protecting internal devices and providing a user interface； a first actuator which causes reciprocation about a first axis； a second actuator which causes reciprocation about a second axis； and a stage which is pivotally moved by the first actuator and the second actuator around a fixed axis. The cartridge (200) comprises: a cartridge housing for receiving a transducer therein and sealing a liquid； a flat window which is installed in the cartridge housing to transmit ultrasonic waves to a treatment area； a body coupling part for coupling with the head body (100)； an ultrasonic transducer which generates ultrasonic waves if an actuation signal is inputted via the body coupling part； and a fitting member which moves the ultrasonic transducer along the flat window by the pivot movement of the stage transmitted via the body coupling part for in-plane scanning.Cette invention concerne une cartouche à ultrasons capable d'effectuer un balayage uniforme même par commande biaxiale, améliorant ainsi la performance de traitement de l'obésité, et une tête de traitement par ultrasons l'utilisant. La tête de traitement par ultrasons (10) selon l'invention comprend un corps de tête (100) et une cartouche (200) qui se fixe au corps de tête (100) et peut en être détachée. Le corps de tête (100) comprend : un boîtier de corps destiné à supporter et à protéger des dispositifs internes et qui offre une interface utilisateur ； un premier actionneur qui provoque un mouvement de va-et-vient selon un premier axe ； un second actionneu
