In order to study species of the Fascioloidae in Korea, a series of morphological and taxonomical studies were carried out and the following results were obtained. Among the species of the Fascioloidae in Pusan area, intermediate form (F. indica?) were 70 percent, F. gigantica 25 percent and F. hepatica, 5 percent. None experimental, natural infective rate of the Fasciolosis was 3.3-3.4 percent among the cattles (Bos taurus var. domesticus) in Pusan area.
