A general analysis has been developed to study fluid flow and heat transfer characteristics for mixed convection along a rotating vertical slender cylinder. Transformed set of coupled non-linear partial differential equations is solved by an implicit finite difference scheme in combination with the quasilinearisation technique. The effects of rotational, buoyancy and suction/injection parameters have been investigated in the present study. The effects of various parameters on the velocity profiles in x- and theta-directions and the temperature profile are reported in the present study. The buoyancy force causes considerable velocity overshoot for low Prandtl number (Pr) fluids. The Prandtl number (Pr) strongly affects the surface heat transfer rate. Numerical results are presented for the skin friction coefficients in x- and theta-directions and for the Nusselt number. (C) 2007 Elsevier Ltd. All rights reserved.