This study was carried out in order to see the present state of assortative mating among modern Japanese by the method of family line investigation. The author undertook to make a statistical analysis of mate selection by means of factor analysis following anthropometric, sociological and demographic traits of the population. Analyzed by means of husbandwife correlation coefficients for both the first and second generations, the second generation has a tendency toward close resemblance of

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... s, especially in stature, as compared with the first generation. The contributive factors in assortative mating were analyzed by factor analysis. As the cumulative contribution of three factors from the first to the third factor, education, physical fitness and physique, was about 60%, these factors could be taken as major components contributing to assortative mating.