1) The general composition, vitamin, amino acid, digestibility and nutrition efficiency of the seeds of Pinus Koraiensis Sieb. et Zucc. were examined. (2) Pine tree seed contains approximately 17% or more protein nearly pure one. The amino acid composition of the protein was analyzed. When compared with the values of soybean and peanut reported in the literature, it contains slightly mare histidine and glycine etc., showing that the seeds are of high nutritional value. (3) The protein digestibility was 87% and the total content of digestible protein was approximately 14.9%, T.D.N. was 159.4%, proving itself excellent. (4) As to vitamins, it was found out that the seeds contain 275 r of $B_1$ and 99 r. As to minerals, Ca (301.2 mg) P (361 mg) and K (272 mg) were found to be contained in the seeds (5) The basic diet was considered nearly perfect from the view-point of nutrition, and to this were added 30%, 5% and 10% of the test sample respectively and were fed to albino rats. Among the three treatment, the 3% sample adding proved to be the mast effective one, showing the most efficient growth. Thus it can be presumed that the pine tree seeds certainly contain U.G.F. (6) The anatomical examination of the intestines of albino rats showed that the feeding of pine tree seeds bad favorable effect on the development of heart, kidney and pancreas.