We report a cured case of acute afferent loop syndrome using a conservative approach. A patient with acute afferent loop syndrome occurring in the 6th year after total gastrectomy for gastric cancer, underwent conservative treatment with abstinence from food and water, total parenteral nutrition, insertion of a Denis tube, and treatment with Prostarmon F, Solu-medrol, and Futhan without improvement. The patient was then given Goreisan and Daikenchuto for diuresis and normalization of intestinal peristalsis. Urine output increased within several hours and distention of the afferent loop disappeared in one day. Goreisan did not affect serum electrolyte levels, although it showed a marked diuretic effect. Daikenchuto was effective for restoration of normal intestinal peristalsis, relieving abdominal pain, and inducing regular bowel movements. Chinese medicine formulations thus appeared to be very useful provided that they were appropriately indicated.