WOS: 000307090100001In this paper we study the boundedness of the parametric Marcinkiewicz operator mu(rho)(Omega) on generalized Morrey spaces M-p,M-phi. We find the sufficient conditions on the pair (phi(1), phi(2)) which ensure the boundedness of the operators mu(rho)(Omega) from one generalized Morrey space A to another M-p,M-phi 2, 1 < p < infinity, and from the space M-1,M-phi 1 to the weak space WM1,phi 2. As an application of the above result, the boundedness of the commutator of Marcinkiewicz operators [a, mu(rho)(Omega)] on generalized Morrey spaces is also obtained. In the case a is an element of BMO(R-n), we find the sufficient conditions on the pair (phi(1), phi(2)) which ensure the boundedness of the operators [a, mu(rho)(Omeg...