  Rare radiative decay $\phi\to\eta\pi^0\gamma$ was studied with SND detector
at {VEPP-2M} electron-positron collider and its branching ratio was measured:
$B(\phi\to\eta\pi^0\gamma)=(0.88\pm0.14\pm0.09)\cdot 10^{-4}$. Significant
contribution of the $a_0(980)\gamma$ intermediate state was observed in the
decay. The result is based on total integrated luminosity corresponding to
$2\cdot10^7$ produced $\phi$ mesons.
