The ultrasonic therapy apparatus irradiates a living tissue (S) with focused ultrasound (U1) and brings the focus ultrasound (U1) near the focal point (F) located deep in the living tissue (S) to the living tissue (S). The therapeutic ultrasonic wave irradiation unit (3) for heating to a temperature equal to or higher than the heat denaturing temperature of S) and the living tissue (S) are irradiated with energy waves (U2) and the vicinity of the focal point (F) is below the heat denaturing temperature. A preheating energy irradiation unit (4) for heating to a temperature, and the preheating energy irradiation unit (4) is located on the living tissue (S) located between the therapeutic ultrasonic irradiation unit (3) and the focal point (F). On the other hand, the living tissue is irradiated with energy waves (U2) that do not exert a heating action.超音波治療装置は、生体組織（Ｓ）に対して集束超音波（Ｕ１）を照射して生体組織（Ｓ）の深部に位置する集束超音波（Ｕ１）の焦点（Ｆ）近傍を生体組織（Ｓ）の熱変性温度以上の温度に加熱する治療超音波照射部（３）と、生体組織（Ｓ）に対してエネルギ波（Ｕ２）を照射して焦点（Ｆ）近傍を熱変性温度未満の温度に加熱する予熱エネルギ照射部（４）とを備え、該予熱エネルギ照射部（４）が、治療超音波照射部（３）と焦点（Ｆ）との間に位置する生体組織（Ｓ）に対して加熱作用を及ぼさないエネルギ波（Ｕ２）を生体組織に照射する。
