High precision measurement of Kl3 decays form factors at NA48/2

The data collected by the NA48/2 collaboration in 2003/2004 allowed several high-statistics measurements concerning Kaon decays. In this talk the measurement of the form factors of the semileptonic decays K±→e±νπ0 (Ke3) and K±→μ±νπ0 (Kμ3) is presented, and the results obtained are compared with those from previous experiments.