1) The oxime dehydrogenase activity, besides the oximase action was found in the hen liver preparation. 2) The oxime dehydrogenase activity was detected only in the absence of phosphate. On the other hand, phosphate seemed to be essential for the oximase action. 3) Oximase is activated by addition of FAD, but oxime dehydrogenase is not influenced by it. 4) Further more the dehydrogenase is different from the oximase in respect of the heat stability and the reaction temperature ; by heating at 40℃ the former was activated to some extent, while the latter was inactivated considerably. 5) DPN is the co-enzyme of these enzymes, but TPN shows no coenzymatic action.