This article deals with the effects of mass transfer on the two-dimensional stagnation point flow of an upper-convected Maxwell (UCM) fluid over a stretching surface. The similarity transformations convert the governing nonlinear partial differential equation into nonlinear ordinary differential equation. Computations for the outcoming systems are presented by a homotopy analysis method (HAM). Graphical results for the velocity and concentration fields are sketched and discussed. (C) 2011 Elsevier Ltd. All rights reserved.