The aim of this study was to identify and confirm the trifactorial structure of the Barratt Impulsiveness Scale (BIS-11) proposed for adults by Patton, Stanford and Barratt (1995) in a sample of children and adolescents. The sample consisted of 600 children between of 9 and 17 years old (M = 12.9, SD = 2.3). For the factorial analysis the data were divided into two random samples. In the first subsample the Exploratory Factorial Analysis was performed, and three dimensions were identified. Subsequently, in the second subsample, Confirmatory Factor Analysis was performed. The factorial solution of 19 items showed adequate fit (CFI = .909, IFI = .912, RMSEA = .043 CI [.032 − .054], χ2/gl = 1.561). The total Cronbach alpha was α = .795. Each scale has acceptable coefficients: Attentional Impulsiveness α = .641, Motor Impulsiveness α = .659 and Non-planning Impulsiveness α = .727.El objetivo de este estudio fue identificar y confirmar la estructura trifactorial de la Escala Barratt de Impulsividad (BIS-11) propuesta para adultos (Patton, Stanford y Barratt, 1995) en una muestra de 600 niños y adolescentes entre 9 y 17 años de edad (M = 12.9, DT = 2.3). Para el análisis factorial los datos fueron divididos aleatoriamente en dos. Con la primera submuestra se realizó el Análisis Factorial Exploratorio, en el que se identificaron tres dimensiones. Posteriormente, con la segunda submuestra se llevó a cabo el Análisis Factorial Confirmatorio. La solución factorial resultante de 19 ítems arroja adecuados indicadores de ajuste (CFI = .909, IFI = .912, RMSEA = .043 CI [.032 − .054], χ2/gl = 1.561). El alfa Cronbach total ha sido α = .795. Las escalas obtienen coeficientes aceptables para estas edades, Impulsividad Atencional con α = .641, Impulsividad Motora α = .659 e Impulsividad no Planificadora α = .727.