As for the adaptation and validation of the Acceptance of Modern Myths about Sexual Aggression (AMMSA) scale to Chilean population, a research was designed. In Study 1, 428 participants answered to the Chilean adaptation of the AMMSA scale. A confirmatory factorial analysis did not give support to the measurement model of 30 items, improving the indexes after adjusting the model to 14 items (alpha = .90), and increasing validity over the saturated model. In Study 2, 212 participants endorsed the AMMSA-14 scale, as well as sexism and social desirability measures. Results revealed a high correlation with sexism and a low correlation with social desirability. In conclusion, a measurement of the myths about sexual aggression to assess Chilean population was validated.