El estudio de las Competencias Socioemocionales (CSE) ha cobrado particular relevancia en relación al abordaje de problemáticas como la violencia y el delito (Donelly & Ward, 2015; Sharma, et al, 2015). No obstante, existen escasos instrumentos para la medición de las CSE. A raíz de ello, se construyó el Inventario de Competencias Socioemocionales (ICSE, Mikulic et al, 2013). Estudios previos han demostrado sus adecuadas propiedades psicométricas en muestras de adultos de Buenos Aires (Mikulic, et al., 2013, 2015). Sin embargo, aún no se han aportado evidencias sobre su validez y fiabilidad en adultos infractores de la ley penal. Se propone analizar la estructura interna del ICSE, utilizando Análisis Factorial Confirmatorio, y evaluar su consistencia interna. Participaron 208 adultos infractores de la ley penal que se encontraban privados de su libertad en Unidades Penitenciarias de la Provincia de Buenos Aires, con un rango de edad de 18 a 45 años (M=28; DE=7). Se validó un modelo de nueve factores correlacionados y 63 ítems con adecuados índices de bondad de ajuste y óptimas saturaciones factoriales estandarizadas. Los índices de fiabilidad alfa ordinal y omega obtenidos en cada uno de los factores fueron adecuados. Se evidencian óptimas propiedades psicométricas en la muestra reseñada. Palabras clave Competencias emocionales - Población reclusa - Validación - Instrumentos ABSTRACT VALIDATION OF SOCIO-EMOTIONAL COMPETENCIES INVENTORY FOR THE PRISON POPULATION The study of Socioemotional Competencies has gained particular relevance in relation to addressing problems such as violence and crime (Donelly & Ward, 2015; Sharma, et al, 2015). However, there are few instruments for its measurement. As a result, the Socioemotional Competencies Inventory (ICSE, Mikulic et al, 2013) was constructed. Previous studies have demonstrated its adequate psychometric properties in samples of adults from Buenos Aires (Mikulic, et al., 2013; Mikulic, et al., 2015). However, to date no evidence has been provided on its psychometric properties in adult criminal offenders. It is proposed to analyze the internal structure of the ICSE, using Confirmatory Factor Analysis, and to evaluate its internal consistency. Participants were 208 adult offenders of the criminal law who were deprived of their liberty in Penitentiary Units of the Province of Buenos Aires, with an age range of 18 to 45 years (M=28; SD=7). A model of nine correlated factors and 63 items with adequate goodness-of-fit indices and optimal standardized factor loadings was validated. The reliability indices ordinal alpha and omega obtained in each of the factors were adequate. Optimum psychometric properties are evidenced in the reviewed sample. Keywords Prison population - Socioemotional competences - Psychologi-