An ultrasound therapeutic device has a therapeutic probe (37a). The therapeutic probe (37a) is divided into multiple groups of channels (G1-G4). Each group of channels (G1-G4) has multiple therapeutic oscillators (39). The oscillators (39) belonging to a certain group of channels (G1) first emit a trigger ultrasonic wave (801) toward a focal point (403) in the body of a patient (24). The trigger ultrasonic wave (801) is in the form of pulses and the amplitude (a1) thereof is large. The trigger ultrasonic wave (801) produces bubbles at the focal point (403). The oscillators (39) belonging to the remaining groups of channels (G2-G4) next emit a heating ultrasonic wave (802) toward the focal point (403). The heating ultrasonic wave (802) is a continuous wave and the amplitude (a2) thereof is small. The heating ultrasonic wave (802) destroys the bubbles produced by the trigger ultrasonic wave (801). The heat generated accompanying said destruction induces coagulation of the tissue. The trigger ultrasonic wave (801) and the heating ultrasonic wave (802) reach the same focal point (403) through different parts of the skin. Burns to the skin are thereby avoided.Linvention concerne un dispositif thérapeutique à ultrasons, qui comporte une sonde thérapeutique (37a). La sonde thérapeutique (37a) est divisée en multiples groupes de canaux (G1-G4). Chaque groupe de canaux (G1-G4) comporte de multiples oscillateurs thérapeutiques (39). Les oscillateurs (39) appartenant à un certain groupe de canaux (G1) émettent dabord une onde ultrasonore de déclenchement (801) vers un point focal (403) dans le corps dun patient (24). Londe ultrasonore de déclenchement (801) est sous la forme dimpulsions, et son amplitude (a1) est grande. Londe ultrasonore de déclenchement (801) produit des bulles au niveau du point focal (403). Les oscillateurs (39) appartenant aux autres groupes de canaux (G2-G4) émettent ensuite une onde ultrasonore chauffante (802) vers le point focal (403). Londe ultrasono
