test of efficacy toltraril in piglet was carried piglet of weaning pigs. 634 piglets from 54 sows. were allotted to 2 group. The experiment was repeated three Over approximately 106 Piglets / group. the first group such as used toltraril S 5% and the two group such as used other prophylactic coccidiosis in piglet 3 day. the results revealed that no significant different among treaments.