HIFU is the name given to destroy the cancer site in the prostate with high intensity ultrasound beams. This device has been in use for over 25 years. After learning where the tumor in the prostate developed in MRI and proving that the survival of the patients was similar with only the treatment of the lesion, we started to use the HIFU method more. Because, thanks to this method, we almost never see the complaints of urinary incontinence and erectile dysfunction after the surgical treatment of prostate cancer. First of all, it is necessary to determine whether the patient is suitable for this method. After HIFU treatment, the patient lies in the hospital for 1 day and while discharged, the patient can go home without any pain and pain, as if he had never had an operation.