The microwave dehydrogenation of ethane was investigated on natural carbonaceous materials such as Korean anthracite(KAK) or char, and Pd or Pt supported by γ-Al₂O₃ and α-SiC. It was found that KAK was the best effective for the microwave catalytic conversion of ethane to ethylene. The selectivity of 87.3% was obtained at 72.8% ethane conversion at the incident microwave power of 800watts.