This paper deals with the effects of thermophoresis particle deposition, radiation and magnetic field on the flow, heat and mass transfer characteristics in a combined convective boundary layer flow over a stretching vertical plate. The governing boundary layer equations are transformed to a dimensionless form by similarity transformations. The transformed coupled nonlinear ordinary differential equations are solved numerically by using the shooting method. The effects of different parameters on the dimensionless velocity, temperature, and concentration profiles are shown graphically. In addition, tabulated results for the local skin-friction coefficient, the local Nusselt number, and the local Sherwood number are presented and discussed.