Several studies have shown the influence of personality in risky sexual behaviors. This work has sought to establish which personality variables favor or hinder condom use in Spanish youth. A total of 408 young heterosexuals were assessed, divided into risk group (60.8%) and no-risk group (39.2%), according to systematic condom use. The results show statistically significant differences in Openness to Experience (p = .039), Conscientiousness (p = .047), Actions (p = .001), Competence (p = .024), and Self-discipline (p = .046). The regression analysis revealed that Compliance explained about 14 percent of the variance in condom use. The tendency to behave in a cooperative, peace-making, and indulgent manner influences in HIV prevention.