The present invention relates to a rectal balloon device for prostate cancer radiation treatment, and more specifically, as a rectal balloon device for prostate cancer radiation treatment, inserted into the rectum for prostate cancer radiation treatment, inflated and contracted, and the rectum inside diameter when expanded Balloon to prevent the movement of the prostate by fixing the position of the prostate during radiation treatment； A guide for inserting a rectum to be a passage for supplying or discharging fluid for contraction or expansion of the balloon, and guiding the balloon to be inserted into the rectum； A balloon expansion guide connected to the rectal guide for supplying or discharging fluid, and supplying fluid so that the balloon can expand or contract within the rectum； And a guide closing valve connected to the balloon expansion guide, for supply and discharge of fluid injected through the balloon expansion syringe, and a guide for controlling blocking. According to the rectal balloon device for prostate cancer radiation treatment proposed in the present invention, a balloon for preventing the movement of the prostate through fixing the position of the prostate, a rectal guide for guiding the balloon to be inserted into the rectum, Radiation prostate cancer by providing a balloon expansion guide to supply fluid through a rectal insertion guide so that the balloon expands in the rectum, and a valve for closing and closing the guide to control the supply and discharge of fluid and blocking. In order to treat the prostate, it expands in the rectal area corresponding to the prostate, so that the rectal wall is in close contact with the prostate, prevents the movement of the prostate, and fixes the position of the prostate to increase the radiation treatment effect by minimizing the range of exposure that regulates the range of radiation therapy. I can do it. In addition, according to the rectal balloon device for prostate cancer radiation treatment of t
