Formation of the standing wave with the interference of the ultrasonic lighting beam and the reflected beam which were irradiated inside the cranium is evaded, it is the ultrasonic brain blockage remedy device which the side effect of destruction of the brain cell, occurrence of brain extravasation and destruction etc of nervous tissue does not occur. Ultrasonic probe cap 20A constitutes arranging plural lamination small-sized oscillators 21 which are formed with the PVDF film and the PZT ceramics etc into mosaic condition other forms in the cap inside. High frequency for oscillator drive uses the continual sine wave, the bursting wave or the pulse wave, as the standing wave does not occur inside the cranium, with the continual sine wave below frequency modulation speed 1ms, below cycle period 1ms, with the bursting wave and the pulse wave below one excited period 1ms, makes below cycle period 1ms. Plural lamination small-sized oscillators 21 select drive according to thrombus position. The cooling jacket is arranged with the cap and the head, temperature rise inside the cranium is held down and the oscillator is cooled.
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