Denitration catalyst structure

A denitration catalyst unit in which a plurality of plate-shaped catalyst elements having an edge on the gas inflow side, an edge on the gas outflow side, and edges on both ribs are stacked such that the edges on the gas inflow side and the edges on both ribs are aligned, each of the plate-shaped catalyst elements has, in an alternating manner, a plurality of flat plate-shaped flat sections and plate-shaped uneven sections having ridges on the upper and lower surfaces thereof. The ridges are disposed in parallel to each other and are inclined at an angle of 50-85 DEG with respect to the direction of extension of the edge of the plate-shaped catalyst element located on the gas inflow side. The ridge line of the ridge on the upper surface of one plate-shaped catalyst element and the ridge line of the ridge on the lower surface of the other adjacent plate-shaped catalyst element are arranged so as to intersect with each other. At least one of the intersecting points is located within a range of more than 0 mm an