Reports on the development of the Male Role Norms Inventory (MRNI), which consists of 58 items grouped into 7 subscales: Avoidance of Femininity, Homophobia, Self-Reliance, Aggression, Achievement/Status, Attitudes Toward Sex, and Restrictive Emotionality. The MRNI was administered to 287 Ss (mostly undergraduate students). Data analysis included an assessment of internal consistency, confirmatory factor analysis, and analyses of variations in responses by sex, marital status, and age. Results indicate that the MRNI consists of 3 factors: Factor 1, consisting of 5 subscales, is relatively homogeneous and seems to tap aspects of male role norms that are currently changing; Factors 2 and 3, consisting of the Self-Reliance and Aggression subscales, respectively, seem to tap aspects of male role norms that remain stable. (PsycINFO Database Record (c) 2012 APA, all rights reserved)