Woodceramics was fabricated from cotton paper (CP-WCMs) as a VOC (volatile organic compounds) sensor. CP-WCMs fabricated from the cotton paper consists mainly of carbon and the impurities are very few, so that cotton paper is suitable for WCMs raw material due to its homogeneity and the purity. The impedance response of CP-WCMs when exposed to butyl acetate gas (one of VOC) was measured. The impedance of CP-WCMs decreased with the increase of butyl acetate gas concentration. Consequently, CP-WCMs seems to be suitable for butyl acetate gas sensor.