  Primordial non-Gaussianity is a crucial test of inflationary cosmology. We
consider the impact of non-Gaussianity on the ionization power spectrum from 21
cm emission during the epoch of reionization. We focus on the power spectrum on
large scales at redshifts of 7 to 8 and explore the expected constraint on the
local non-Gaussianity parameter f_NL for current and next-generation 21 cm
experiments. We show that experiments such as SKA and MWA could measure f_NL
values of order 10. This can be improved by an order of magnitude with a
fast-Fourier transform telescope like Omniscope.
