A whole of 43 was evaluated of football players, 26 selected Chilean sub 20 and 17 players of the champion nursery of university football of 2007 of the Pontificia Universidad Catolica de Valpara so (PUCV), all of them under his informed assent. Was evaluated under the protocol of marking and measurement of the International Society of Avancement in Kineanthropometric (ISAK) for the in normal conditions of temperature, in the early morning and after the urinary emptying, by assessors by license level II of ISAK. The measured variables were weight, stature of foot, stature sat, muscular perimeters, bony diameters and cutaneous folds. All these measures are in use for the formulae of corporal composition of D. Kerr, (1988) and for the antropometrics method of the Somatotype of Heath-Carter (2004). There exists a difference of 3, 4 years between both groups what differentiates some other components of the morphoestructure as a major quantity of oily and minor quantity of muscle of the group sub-20 in comparison with the group PUCV and a graphical representation of the somatotype that corroborates these differences. The differences in the components of the corporal composition between both groups have two fundamental reasons. The first one for the major development and physical ripeness of the group PUCV who to the major being, has averages of stature and I weigh also major. The second reason is the level of performance of the group PUCV, which on having had n major development allows the accomplishment of trainings them prolonged and of major intensity, demonstrating a major muscular development and minor quantity of fat in comparison with group sub-20. We conclude that according to the factors anthropometrics the group PUCV is capable to obtain a sports major performance that the group sub-20, being this a foundation to the moment to choose the national pre-selections players.