Self-efficacy for 60 work activities and that in relation to 30 occupational titles were assessed for 259 Japanese undergraduates. The work activities were classified into six domains in terms of Holland's (1973, 1985) model environments; realistic (R), investigative (I), artistic (A), social (S), enterprising (E), and conventional (C) domains. Men were significantly higher than women in self-efficacy for the realistic domain, whereas women were significantly higher than men for the artistic domain. For 28 (93.3%) of the 30 occupations, self-efficacy for the domains corresponding to the three-letter codes (e.g., C, E, and S, for an "accountant") associated with the respective occupations was highly predictive of career self-efficacy. The self-efficacy construct of Holland codes and model environments, the construct validity of self-efficacy measures in relation to occupational titles, and the gender differences in work activities are discussed. © 1991.