We calculate the branching ratio of omega --> pi^+ pi^- gamma decay in a
phenomenological framework in which the contributions of VMD, chiral loops,
sigma-meson intermediate state amplitudes and the effects of omega-rho mixing
are considered. We conclude that the sigma-meson intermediate state amplitude
and omega-rho mixing make substantial contribution to the branching ratio.Comment: 10 pages RevTex, 4 Figures, to be published in Acta Phys. Pol.
