Eaters of guar gum(GG) were synthesized by the solvent free method. Guar gum was acetylated with acetic anhydride and iodine as catalyst without any use of solvent. The reaction was carried out at 500C for 4 hrs. with stirring. The product is purified by acetone and the D.S. is measured. The D.S. of the product obtained was 0.6. The synthesized product was characterized by Fourier TransformInfrared Spectroscopy (FTIR).