To provide a method for manufacturing a shift catalyst showing sufficient catalytic activity even under lower temperature conditions and capable of suppressing deterioration in the catalyst even in a high temperature and oxidative atmosphere.

The shift catalyst is manufactured in steps of: preparing an oxide porous body (step S100); preparing a Pt-platinum group metal composite colloid solution (step S110); depositing Pt and the platinum group metal on the oxide porous body by using the above Pt-platinum group metal composite colloid solution (steps S120, 130); depositing an additive metal such as Mo thereon (step S140, 150); and forming to complete the shift catalyst (step S160). Thus, Pt and the platinum group metal are deposited as particles of the mixture on the oxide porous body, and the additive metal is also present on the oxide porous body, which results in the shift catalyst excellent in low temperature activity and durability.