This study aimed to determine the relationship between demographic factors and sexual knowledge about HIV / AIDS among adolescents from the Educational Institution "Juan Jimenez Pimentel", sociodemographic factors determining adolescents, determining adolescent sexual factors, determine the level of knowledge about HIV / AIDS, identify whether the demographic factor is significantly associated with knowledge of HIV / AIDS and to identify whether the sexual factor is significantly associated with knowledge of HIV / AIDS. A Quantitative study type, because it starts with preconceived ideas about sex and sociodemographic factors. The sample was obtained by simple random sampling consisting of 196 adolescents selected inclusion criteria, with a confidence level of 95%, the technique used in the study was the survey and the survey instrument. According to the objectives is obtained the follow...