Coherent Anti-stokes aman Spectroscopy (CARS) of the Q-branoh (v = 0→v= 1) of NO has been obtained with folded BOXCARS which can provide high and unambiguous spectral resolution for diagnostic purpose. CARS measurement were perfermed for various gas pressures and various las er linewidths. A theoretical calculation of the CARS spectra, taking into account the laser linewith and lineshape, is presented and compared with experimental results. The calculated and compared with experimental results. The calculated CARS spectra using the horentzian laser lineshape gives the good fit to the experimental CARS.