Аннотация:The self-focusing of elliptically polarized gaussian beam in isotropic gyrotropic medium with spatial dispersion of nonlinearity has been investigated numerically. Along with the effects predictable by traditional self-focusing theories the new peculiarities of the self-focusing have been found which cannot be described in principle by the aberrationless approximation theory. The dynamics of the light beam cross-section polarization state distribution changes in a process of the beam propagation have been investigated.