A boundary layer analysis is presented to study the effects of magnetic field with vectored surface mass transfer and induced buoyancy streamwise pressure gradients on heat transfer to a horizontal plate placed in a micropolar fluid. Numerical solution are obtained for different values of the magnetic-, mass transfer-, buoyancy-, and material-parameters. A discussion is provided for the effects of the transverse magnetic field, vectored surface mass transfer and the buoyancy force on the friction factor and heat transfer rate.