PURPOSE: To enhance the production activity of methane by incorporating 5W300 pts.wt. nickel oxide for 100pts.wt. carrier containing the oxide of alkali metallic elements and thereby forming a catalyst for producing gas contg. methane.

CONSTITUTION: A carrier incorporating the oxide of alkali metallic elements is prepared by covering alumina and titania or the like with the oxide of alkali metallic elements such as potassium oxide and sodium oxide. A mixture obtained by mixing the powder of this carrier with powdery nickel compd. is molded, and thereafter it is calcined to obtain a catalyst for producing gas contg. methane. In this case, 5W300pts.wt. nickel oxide is incorporated for 100pts.wt. carrier containing alkali metallic oxide. Further the content of alkali metallic oxide incorporated in the carrier is preferably regulated to ≥1wt.% and more preferably regulated to ≥5wt.%.