Recombinant microorganism with improved butanol production ability and method for producing butanol by using the same

A recombinant microorganism with improved butanol production ability and decreased ethanol production ability in comparison to a wild type microorganism,

• wherein the microorganism is Clostridium acetobutylicum,
• wherein a pathway converting acetyl-CoA to acetate is inhibited, a pathway converting acetyl-CoA to butyryl-CoA is promoted, and a pathway converting butyryl-CoA to butyrate is inhibited,
• wherein the pathway converting acetyl-CoA to acetate is a pathway in which acetyl-CoA is converted to acetate by acetate kinase or phosphotransacetylase,
• wherein the pathway converting acetyl-CoA to butyryl-CoA is a pathway in which acetyl-CoA is converted to butyryl-CoA by thiolase or hbd-crt-bcd operon, and
• wherein the pathway converting butyryl-CoA to butyrate is the pathway in which butyryl-CoA is converted to butyrate by butyrate kinase.