  We study the effects of non-Gaussianity from primordial black holes (PBHs).
The formation of PBHs is in general a rare event and the number of PBHs
fluctuates following the Poisson distribution function, which is independent
from the pre-existing inflationary adiabatic fluctuations. Such fluctuations
can dominate over the adiabatic mode on small scales. We focus on the
non-Gaussianity of matter density fluctuations induced by the Poisson
fluctuation of PBHs and discuss the potentially observable consequences such as
the skewness, kurtosis and the scale-dependent bias.
