||This study was designed to obtain evidence of the internal validity of a Spanish version for adolescents of the Profile of Mood States questionnaire, POMS (Andrade, Arce, Armental, Rodríguez & De Francisco, 2008). Andrade et al. ’s version was previously developed with items selected through scaling objects. The sample for this study was composed of 320 adolescent athletes - 194 males and 126 females - with a mean age of 14. 95 (SD = 1. 29). A confirmatory factor analysis was used to test the congruence between the data and the proposed model. The best fitting measurement model was one with 29 items and 6 first-order factors: Tension, Depression, Anger, Vigour, Fatigue and Friendliness. The values obtained for the most habitual global goodness-of-fit indices were as follows: c2 (361) = 684. 25 (p < . 01), CFI = . 96, NNFI = . 96, RMSEA = . 053 (with limits of . 047 and . 059 for the confidence interval at 90%) and SRMR = . 061.