The general aspects of the selection of science subjects for the enterance examination of college and the factors affecting on tendency of the selection were investigated by using the data of registration records from a preparatory school for examinees. Major findings of this study are as follows. Firstly, most of the students choose biology and the rest of them chemistry, earth science and physics in order. Secondly, the difference of the tendency of selection of subjects for male and female students are not found. Thirdly, the correlation between the score of the national preliminary enterance examination for college and that of the trial examination in preparatory school is neglibibly small.