This ultrasonic treatment apparatus treats a treatment target organ, suppressing raise of the temperature at a surface of the treatment target organ, without making the apparatus large. This ultrasonic treatment apparatus includes an ultrasonic element which faces a surface of a treatment target organ through an acoustic propagation medium and which generates ultrasonic wave converged on a depth position of the treatment target organ, and a controller for adjusting the ultrasonic wave irradiated to the treatment target organ from the ultrasonic element, wherein the controller changes intensity of the ultrasonic wave which is irradiated into an area of the surface so that heat which is generated when the ultrasonic wave radiated by the ultrasonic element passes through the surface and which remains at a vicinity of the surface is kept equal to or less than a predetermined threshold value.