espanolRESUMEN Todos los estudiantes sufren el riesgo de ser victima de conductas agresivas de bullying durante el transcurso de su vida. Sin embargo, existen colectivos con mayor riesgo de sufrir estas conductas, en especial, el colectivo LGTB. Este estudio tiene tres objetivos: (1) analizar la prevalencia de victimas y agresores de bullying entre adolescentes de secundaria, (2) explorar diferencias en funcion del sexo y (3) conocer las diferencias en funcion de la orientacion sexual. Una muestra compuesta por 1,748 adolescentes del Pais Vasco cumplimento dos cuestionarios. Los resultados evidencian (1) un elevado porcentaje de victimas (41.6% globales, 11% severas) y de agresores (28.5% globales, 2,7% severos), (2) que las chicas muestran mayor victimizacion y los chicos agresion y (3) que hay un mayor porcentaje de victimas no-heterosexuales, en especial de gais y bisexuales. En conclusion, las personas LGTB muestran una mayor vulnerabilidad a sufrir acoso escolar, por lo que es necesario desarrollar e implementar programas antidiscriminatorios en la comunidad educativa. EnglishABSTRACT Every student is at risk of aggressive bullying behavior during their lifetime. However, there are groups with a higher risk of suffering these aggressive behaviors, especially the LGTB group. This study has three objectives: (1) to analyze the prevalence of victims and aggressors of bullying among high school adolescents; (2) to explore differences based on sex; and (3) to identify differences based on sexual orientation. A sample consisting of 1,748 adolescents from the Basque Country completed two questionnaires. The results show (1) a high percentage of victims (41.6% global, 11% severe), as well as aggressors (28.5% global, 2.7% severe); (2) that girls show greater victimization and boys show aggression; and (3) a higher percentage of non-heterosexual victims, especially gay and bisexual. In conclusion, LGTB people show greater vulnerability to suffer bullying and, therefore, the need to develop and implement anti-discrimination programs in the educational community.