  The collinear QCD structure of the electron is studied within the Standard
Model. The electron structure function is defined and calculated in leading
logarithmic approximation. It shows important contribution from the
interference of the intermediate electroweak bosons. The problem of momentum
scales is extensively discussed. The master equations for the QCD parton
densities inside the electron are constructed and solved numerically in the
asymptotic region. Significant corrections to the naive evolution procedure are
found. Phenomenological applications at present and future momentum scales are
discussed.
