Glycan are fascinating biomolecules found abundantly in Nature. This precious compound has very high potential in various domains useful to mankind. Some Glycans are known to have anti tumor property. These biomolecules are less explored for their application potential. Glycan was isolated from a medicinal mushroom, a macro fungus known as Ganoderma lucidum. This fungus is well known for its therapeutic value and it is known as Reishi mushroom in Japan and China. The glycan from this fungus were isolated and the structural composition was studied. By trial and error we isolated the compound and structurally identified as beta glucan. Having great potential it is worthwhile to study this molecule.