A catalyst carrier module comprising: a can of a rectangular tube shape having an inlet and an outlet; at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; and a fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can, wherein the fixing unit comprises: fixing slots formed to penetrate a side surface (42, 44) of the can; and a wedge member that is fitted to the fixing slots and that fixes between a first can and a second can, which are aligned adjacent to each other, to simultaneously prevent detachment of the at least one cell forming body inserted into the first can and the second can, wherein the wedge member comprises: a fitting groove portion in which side surfaces (42, 44) of the first can and the second can are fitted; a first fixing protrusion protruding from one side of the fitting groove portion and fixing the flat plates and the wave plates laminated to the first can; and a second fixing protrusion protruding from the other side of the fitting groove portion and fixing the flat plates and the wave plates laminated on the second can. a can of a rectangular tube shape having an inlet and an outlet; at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; and a fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can, wherein the fixing unit comprises: fixing slots formed to penetrate a side surface (42, 44) of the can; and a wedge member that is fitted to the fixing slots and that fixes between a first can and a second can, which are aligned adjacent to each other, to simultaneously prevent detachment of the at least one cell forming body inserted into the first can and the second can, fixing slots formed to penetrate a side surface (42, 44) of the can; and a wedge member that is fitted to the fixing slots and that fixes between a first can and a second can, which are aligned adjacent to each other, to simultaneously prevent detachment of the at least one cell forming body inserted into the first can and the second can, wherein the wedge member comprises: a fitting groove portion in which side surfaces (42, 44) of the first can and the second can are fitted; a first fixing protrusion protruding from one side of the fitting groove portion and fixing the flat plates and the wave plates laminated to the first can; and a second fixing protrusion protruding from the other side of the fitting groove portion and fixing the flat plates and the wave plates laminated on the second can. a fitting groove portion in which side surfaces (42, 44) of the first can and the second can are fitted; a first fixing protrusion protruding from one side of the fitting groove portion and fixing the flat plates and the wave plates laminated to the first can; and a second fixing protrusion protruding from the other side of the fitting groove portion and fixing the flat plates and the wave plates laminated on the second can.