Sur le sous-groupe des \'el\'ements de hauteur infinie du K2 d'un corps   de nombres
  By using the logarithmic approach of the classical kernels for the K2 of number fields, we compute the 2-rank of the wild kernel WK2(F) and the 2-rank of the subgroup of infinite heigh elements in K2(F) in terms of positive class groups for any number field F. 
Jean-Fran\c{c}ois Jaulent (IMB), Florence Soriano-Gafiuk (LMAM)