AbstractThis article reports on three phases of the development of a Likert‐type scale measuring heterosexual attitudes toward homosexuality. Phase 1 describes the development of the scale. Item analysis yielded 20 statements with item‐total correlations ranging from .57 to .74. In Phase 2 the 20‐item Heterosexual Attitudes Toward Homosexuality (HATH) Scale was administered to 82 subjects. Analysis yielded a corrected split‐half correlation of .92, and the scale was found to discriminate between individuals based on sex, academic major, and church attendance. In Phase 3 (a validation study) the HATH was administered with several additional attitude scales and indexes of an exploratory nature. Analysis yielded a corrected split‐half correlation of .92. As in Phase 2, a significant effect of sex was found; females appear more tolerant than males. In addition, the HATH correlated significantly with peer attitudes, religiosity, and authoritarianism. The scale has satisfactory reliability and shows promising construct validity.