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

CONSTITUTION: A carrier containing the oxide of alkali metallic elements is prepared by covering the carrier such as alumina and titania with the oxide of alkaline earth metallic elements such as magnesium oxide, calcium oxide and barium oxide. At this time, the content of the oxide of alkaline earth metallic elements is preferably regulated to ≥1wt.% and more preferably regulated to ≥5wt.%. Then a mixture obtained by mixing the powder of this carrier with the powder of nickel compd. is molded and calcined, and thereby a catalyst for producing gas contg. methane is obtained. At this time, 5W300pts.wt. nickel oxide is incorporated for 100pts.wt. carrier.