This paper examines the effects of some gender-related factors (namely, the gender congruency of the type of business, the population ratio of female employees to their male counterparts, and the organizational climate) on the gender differences of the ratio of managerial grade employees to the entire work force, by analysing the organizational demographics. The differences of the average age and average years of continuous service between male employees and female employees were adopted as the indices of the organizational climate. Organizational demographics of 566 enterprises sampled from a job-recruiting information book were coded into certain categories relating to the above factors. Three hundred and four adult people were asked to rate the degree of gender congruency of each type of business. Results show no significant effects of gender congruency of the type of business nor effects of the gender population ratio on the sex difference of the ratio of managerial grade employees. The smaller the sex differences of the average age, the higher the ratio of female managerial employees. These findings are discussed in comparison with previous studies.