PURPOSE: To provide a catalyst enhanced in hydrogenation activity converting unsaturated hydrocarbon or aromatic hydrocarbon in hydrocarbon oil to saturated hydrocarbon, low in the ratio of hydrocarcking and having high resistance against impurities such as a sulfur compd., a nitrogen compd. or the like and a hydrocarbon, oil hydrogenating method using the catalyst.

CONSTITUTION: A hydrogenation catalyst of hydrocarbon oil is obtained by supporting at least one kind of a metal belonging to the VIII group on a carrier containing L-zeolite and/or β-zeolite. Hydrocarbon oil is hydrogenated in the presence of this catalyst.