The development and initial psychometric investigation of the Dating Attitudes Inventory (DAI) is reported. The DAI was created, to fill a gap in the literature and to measure specific masculine ideology and traditional gender attitudes that rationalize the abuse of women. Using a sample (n = 164) of male college students, a 20-item measure was developed consisting of two subscales (Rationalization of Abuse and Dominance and Control) and a total score. The 20-item DAI and other measures used for validation were completed by 216 male college students. The DAI correlated in theoretically expected ways with measures of propensity for abusiveness, relational dominance, and masculine gender role stress. A confirmatory factor analysis supported the two theorized factors of the DAI. Results of the present study offer initial support for the validity and reliability of the DAI. The authors discuss the importance of measuring masculine gender role attitudes and beliefs that support and rationalize dating violence. (Contains 4 tables.)