Abstract. In the present article, we derive some new inequalities of HermiteHadamard type involving left-sided and right-sided generalized fractional integral operators for products of two m-convex and ( ; m)-convex functions, respectively. It is worth mentioning that the presented results have close connection with those in [6]. These new results generalize the existing HermiteHadamard type inequalities for products of two functions. Therefore the ideas of this article may stimulate further research in this …eld.