This experiment was conducted to increase the nutritive value of perilla meal and to investigate the presence of the growth inhibiting factor in the meal. The first feeding test was carried out with F₁ chicks between W. Rock and W. Cornish which were fed the diets containing 0, 15, 20 and 25% of perilla meal from one day to 4 weeks of age. And two types of perilla meal treated by dry autoclaving at 15 p.s.i. for 30 min. were also fed at 20% level of diet, respectively. The second feeding test was carried out with S.C.W. Leghorn which were fed the diets containing 0, 15 and 25% of perilla meal for 3 weeks. Each perilla meal treated as follows was added into the diets at level of 25%. 1. autoclaved at 15 p.s.i. for 30 min. and washed with water. 2. autoclaved 15 p.s.i. for 30 min. and unwashed. 3. boiled for 30 min. and washed. 4. Soaked with tap water for 8 hrs. and washed. Each experimental diet was prepared to be isonitrogenous and isocaloric. The experimental results obtained were as follows: No significant difference was found in body weight gain between chicks fed no treated high level of perilla meal and fed control diet in both experiments. Although, no significant difference was observed in feed efficiency between chicks of each levels of perilla meal, feed efficiency was decreased as the level of perilla meal was increased. In test Ⅰ, dry autoclaving of perilla meal gave no effect on weight gain or feed efficiency of chicks. In test Ⅱ, the treatments of wet autoclaving, boiling and water soaking of periila meal following washing, respectively, decreased weight gain of chicks compared with that of control group. But chicks fed perilla meal treated by autoclaving-unwashed was increased weight gain more than that of control group with no significant. Decrease in nitrogen retention percent was observed among the groups fed perilla meal at levels of 15 and 25% of no treatment and treated by autoclaving-washing or water-soaking-washed, and these were significant at 5% level. It can be concluded that there is no growth inhibiting factor in perilla meal because chicks fed high levels of perilla meal showed normal growth and fed various physical treatments of perilla meal gave no increase in weight gain.