  We study the neutral pion mass in the presence of an external arbitrary
magnetic field in the framework of the linear sigma model coupled to quark
(LSMq) at finite temperature. In doing so, we have calculated the pion
self-energy, constructed the dispersion equation via re-summation, and solved
the dispersion relation at zero three momentum limit. In calculating the pion
mass, we have included meson self-coupling's thermal and magnetic contribution
and approximate chiral order parameter $v_0$. We report that the $\pi^0$ mass
decreases with the magnetic field and increases with temperature.
