Oxidation of p-anisaldehyde by microwave irradiation produces p-anisic acid under solvent2 free condition. This oxidation reaction is performed in presence of different red, white and black 3 organic clay as catalyst. This method possess functional group compatability, does not involve 4 cumbersome work-up exhibits chemoselectivity since other functional groups remain intact and proceeds under mild reactions. The structure of the obtained products were analyzed by 1H and 13 5 C 6 NMR(Nuclear Magnetic Resonance) spectral studies and organic clay catalysts were characterized 7 by EDX(Energy dispersion x-ray analysis), XRD (X-ray diffraction) tenchniques. Elemental 8 composition of red, white and black clay determined by EDX pattern recorded in the binding energy 9 region of 1-10 KeV. XRD studies showed average crystallite size of clay catalyst is in the range of 20 10 - 30 nm. The resulting product obtained in good yield within reasonable time.