El presente trabajo explora, en una muestra de estudiantes repitentes y no repitentes de nivel medio, la variable autoconcepto, siendo considerada como un factor multidimensional que mide: comportamiento social, estatus intelectual y escolar, imagen corporal, ansiedad, popularidad, bienestar y satisfacción. La muestra estuvo conformada por 73 estudiantes pertenecientes a colegios privados y estatales de la Provincia de San Luis, cuyas edades oscilaron entre 14 y 17 años. Se administro la escala de Autoconcepto de Piers Harris (Adaptación de Casullo 1990). De acuerdo a los resultados obtenidos, se encontró un nivel de autoconcepto medio en el grupo de no repitentes y un autoconcepto bajo en los repitentes. Palabras clave Autoconcepto Repitencia ABSTRACT SELF-CONCEPT. A COMPARATIVE STUDY BETWEEN REPEATING AND NON-REPEATING STUDENTS This present work explores the self-concept in a sample of repeating and non-repeating student. Self-concept is a factor of many dimensions: social behaviour, intellectual and scholastic status, body image, anxiety, popularity, well-being and satisfaction. The sample was conformed by 73 students, between 14 and 17 years-old. The self-concept Scale of PiersHarris (adapted by M. Casullo, 1990) was taken. According to the obtained outcomes, it was found that the repeating teenagers had a low level of self-concept and the non repeating had an average self-concept. Key words Self-concept Student Repeating