In this paper, we give a transformation formula of Dwork’s p-adic hypergeometric function between t and  $t^{-1}$. As an appendix, we introduce a finite analogue of this transformation formula, which implies a special case of the transformation formula for Dwork’s p-adic hypergeometric function.
$t^{-1}$. As an appendix, we introduce a finite analogue of this transformation formula, which implies a special case of the transformation formula for Dwork’s p-adic hypergeometric function.