Examined relationships between sex‐role identification and Type A behavior. Based on Bem Sex‐Role Inventory (BSRI) scores, Ss (N = 64) were categorized as Androgynous, Masculine, Feminine, or Undifferentiated; the extent of Type A behavior was assessed via the Behavior Activity Profile. After biological sex had been covaried out, it was found that the Masculine group had significantly higher Type A scores than any of the other three groups. Also, Type A behavior correlated significantly with both the Masculinity and Femininity scales of the BSRI even though the scales themselves were statistically independent. It is suggested that identification with masculine but not feminine traits, while perhaps conducive to psychological health, may be dysfunctional in terms of long‐term medical consequences.