We examined condom attitudes, perceived vulnerability to HIV, HIV testing experiences, and sexual and substance use risk behaviors of 161 active Latino male gang members, aged 18-26 years old, living in Los Angeles, California. Gang members reported negative condom attitudes and a perceived vulnerability to HIV. The majority (53%) of gang members reported unprotected vaginal intercourse (UVI) in the previous 12 months. Multivariate analyses indicated that participants who engaged in the following behaviors were more likely to report UVI: had sex with someone they just met (adjusted odds ratio [AOR] = 3.66), received money or drugs for sex (AOR = 5.05), or had sex with someone who had a sexually transmitted disease (AOR = 4.99). Participants with a higher perceived vulnerability to HIV were less likely to report UVI (AOR = 0.82). Our findings offer implications for development of an HIV prevention intervention for Latino male gang members. © 2009 The Guilford Press.