Work-family conflicts (WFC) in university faculty members were investigated. WFC includes time conflicts, family-to-work conflicts, and work-to-family conflicts. Furthermore, energy input into family, work, and personal activities was examined from the perspective of the ideal and reality. A questionnaire survey was conducted with faculty members (N=1757, 1044 women and 713 men ), which inquired about their attributes, WFC, as well as real and ideal energy input into family, work, and personal activities. Results indicated that WFC in female faculty members was higher than in male faculty members, and that WFC in fulltime faculty members was higher than in part-time faculty members. Especially, WFC in female faculty members was significantly high. Moreover, WFC differed depending on the relative amount of energy input into work and family in real life. Results of hierarchical multiple regression analysis indicated that WFC in both male and female faculty members was affected by energy input into family and work in real life. Furthermore, in male faculty members, the effect of energy input in real life on WFC was modified by the expected ideal energy input. In female faculty members, WFC was unavoidable regardless of personal ideals, because energy input in their real life was heavier than in male faculty members. In other words, WFC in male faculty members was inhibited when they had high ideals, even if the energy input into the family increased in their real life.