Heat transfer in the flow of a conducting Fluid between two non-conducting porous disks ( --o n e is rotating and other is stationary) in the presence of a transverse uniform magnetic field and under uniform suction, is studied. Asymptotic solutions are obtained for R<<M 2. The rate of Heat flux from the disks and the temperature distribution are investigated. It is observed that the temperature distribution and heat flux increase with the increase of magnetic field. Nomenclature B 0 imposed magnetic field. p density of the fluid velocity vector. p pressure. /x viscosity of the fluid. v kinematic viscosity of the fluid. Jr radial component of current density. Jo azimuthal component of current density. Jz axial component of current density. /x,, magnetic permeability. o-electrical conductivity of the fluid. U suction velocity. E r radial component of electric field. E o azimuthal component of electric field. E z axial component of electric field. cp specific heat at constant pressure. g2 angular velocity of the rotating disk. u radial component of velocity. v azimuthal component of velocity. w axial component of velocity. F('0) dimensionless function defined in (17) G('0) dimensionless function defined in (17) q~(~) dimensionless function defined in (18) 4J('q) dimensionless function defined in (18) "~ dimensionless axial distance. R suction Reynolds number, Uh/v. R 1 rotation Reynolds number, ~lh2/~,.