The effect of dietary white ginseng on growth of silkworm larva was studied with several young and grown silkworm larvae divided into four groups and fed ad basal artificial diet containing different levels of ginseng extract. The four levels of ginseng extract added to basal artificial diet were: 0 (control), 46.6, 139.9 and 279.8 mg per g of dry diet. The results obtained were as follows: 1. The body weight of silkworm larvae fed ad basal artificial diet containing different levels of ginseng extract was increased in 46.6mg ginseng extract level, 139.9mg ginseng extract level and 279.8mg ginseng extract level order. The body weight was greatly increased in 46.6mg ginseng extract level than in control. It is, therefore. considered that a little white ginseng was effective for larval growth in silkworm rearing with artificial diet. 2. The blood sugar content of silkworm larvae fed on an artificial diet containing several levels of ginseng extract was remarkably decreased as compared wilt that of the control silkworm larvae.