The aim of this paper is to introduce a new class of generalized centralizers on C∗C∗-algebras which is termed as extended (k1,k2)(k1,k2)-centralizer. We study different properties of this class of centralizers. Moreover, we define a class of C∗C∗-algebras which contains the prime C∗C∗-algebras as a subclass. Different properties of extended centralizers with respect to this class of C∗C∗-algebras are discussed with suitable examples.