Though increasing numbers of women are entering the workforce, a disproportionate number of women are placed into upper level management positions. Social role and role congruity theory both posit that women in leadership positions are likely to face more negative criticism than men in leadership positions. The purpose of the current study was to examine the influence of gender roles on leader behaviors as well as leaders' self perceived effectiveness. The study also examined third party raters' views of female and male leaders. Videotapes of forty-seven mixed sex groups with randomly appointed male and female leaders were used to examine leader behaviors as well as raters' effectiveness ratings. Leaders' self perceived effectiveness ratings were also used. Gender roles of the leaders were assessed using the Bem Sex Role Inventory (BSRI). Results of a MANOVA indicated that leader gender roles did not lead to differences in leader behaviors exhibited among those in feminine, masculine, and androgynous groups. For female leaders, femininity was not related to feminine behaviors. Unexpectedly, for male leaders, masculinity was inversely related to masculine behaviors. With regard to raters' effectiveness ratings of the leaders, no differences were found in ratings based on leader gender. Further, for female leaders, …