This paper presents the distribution of solute undergoing first order chemical reaction in axi-symmetric laminar boundary layer flow towards a stretching cylinder embedded in porous medium. Similarity transformations are used to convert the partial differential equations corresponding to the momentum and concentration equations into highly non-linear ordinary differential equations. Numerical solutions of these equations are obtained by shooting method. It is found that velocity decreases with increasing permeability parameter. The skin friction as well as the mass transfer rate at the surface is larger for a cylinder compared to a flat plate.