The purpose of our study is to analyze the motivational differences between soccer 7 and soccer 11. Participants were of 183 male players from three soccer clubs, aged 8 to 18 years. They were administered a Sociodemographic Questionnaire, the Motivational Orientation in Sport Scale by Weiss, Bredemeier y Shewchuk, (1985), the Task and Ego Orientation in Sport Questionnaire by Duda y Nicholls, (1989) and the Perceived Physical Ability Scale by Ryckman, Robbins, Thornton y Cantrell (1982). Both soccer 7 and 11 participants scored higher in task than in ego orientation, were more intrinsicalley that extrinsically motivated and reached mediun to high values in both general and specific perceived physical ability. Soccer 7 participants reached higher scores than soccer 11 athletes in task orientation 8,85 (±1,13), intrinsic motivation 8,64 (±1,10) and perceived physical ability 7,45 (±1,03) and specific 7,52 (±1,81), scales related to sport adherence, though also scored higher in ego orientation 5,34 (±2,32), extrinsic motivation 7,44 (±1,77) and amotivation 3,21 (±2,06), which could be related to their low experience and knowledge of the practised sport. © 2014: Servicio de Publicaciones de la Universidad de Murcia Murcia (España).