This study presents descriptive analysis of gender differences in the content of adolescents' responses on a measure of identity development in the domain of sex role concepts. Subjects included 66 white, middle-class, high school seniors. Responses on the sex roles section of the Ego Identity Interview were coded to reflect Block's (1973) theory of the stages of development of sex role concepts with a particular focus on the stages of "conformity" and "conscientiousness." Only one gender difference emerged. Male adolescents, as compared to female adolescents, more frequently expressed conformity level responses to questions regarding acceptance of non-traditional behavior for men and women. Discussion focused on adolescents' perceptions of peer and parental influences on their development of sex role concepts.