Objective: Cognitive flexibility, identified as a transdiagnostic process in psychopathology, lacks specific Spanish-validated assessment tools. This study aims to examine the psychometric properties of the Cognitive Flexibility Inventory in a Spanish sample (N = 300, mean age = 22.66, SD = 4.92), 76% women). Method: An exploratory structural equation model (ESEM) was used to test the inventory's latent structure. Reliability was calculated, as well as construct validity evidence with measures of emotion regulation, attributional style, and depression. Results: The original bifactorial model of the Cognitive Flexibility Inventory (Alternatives and Control scales) was replicated and obtained good fit indices. One item was excluded due to problematic factor loadings, yielding a final version with 19 items. Evidence of validity and reliability was obtained. Conclusions: The Spanish version of the Cognitive Flexibility Inventory showed satisfactory psychometric properties, making it a suitable measure for the assessment of cognitive flexibility in the Spanish population. Objetivo: La flexibilidad cognitiva, identificada como un proceso transdiagn & oacute;stico en la psicopatolog & iacute;a, carece de herramientas espec & iacute;ficas validadas en espa & ntilde;ol. Este estudio se propone examinar las propiedades psicom & eacute;tricas del Inventario de Flexibilidad Cognitiva en una muestra espa & ntilde;ola (N = 300, media de edad = 22.66, DT = 4.92), 76% mujeres). M & eacute;todo: Se utiliz & oacute; un modelo exploratorio de ecuaciones estructurales para comprobar la estructura latente. Se calcul & oacute; la fiabilidad, as & iacute; como la evidencia de validez de constructo con medidas de regulaci & oacute;n emocional, estilo atribucional y depresi & oacute;n. Resultados: Se replic & oacute; el modelo bifactorial original del Inventario de Flexibilidad Cognitiva (escalas de alternativas y control) y se obtuvieron buenos & iacute;ndices de ajuste. Se excluy & oacute; un & iacute;tem debido a cargas factoriales problem & aacute;ticas, por lo que la versi & oacute;n final incluy & oacute; 19 & iacute;tems. Se obtuvieron pruebas de validez y fiabilidad. Conclusiones: La versi & oacute;n espa & ntilde;ola del Inventario de Flexibilidad Cognitiva mostr & oacute; propiedades psicom & eacute;tricas satisfactorias, por lo que es una medida adecuada para la evaluaci & oacute;n de la flexibilidad cognitiva en la poblaci & oacute;n espa & ntilde;ola.