The result of the experiment which ethylalcohol affect on the X-rays injury advantageously reported by M. Yamamoto who is our co-worker at the same time ago, and we attempted to this experiment that whether ethylalcohol affect on the restoration of X-rays injury usefully or not, and this experiment carried out on 3 groups as following: 1) A group of mice in wich ethylalcohol was not used, 2) B group of mice in which ethylalcohol was used only for irradiated period with 100r×10, 3) C group of mice in which ethylalcohol was used not only for irradiated period with 100r×10, but for 15 days, 30 days after the irradiated with 100r×10, and we found out following results in this experiment. In this case there were more histological restorating figures of spleen, liver injuries than in the case of mice in which ethylalcohol was not used.