To obtain an α-alumina catalyst support for excellent partial oxidation, to provide a method for producing the support and to obtain a catalyst using the catalyst support.

(1) This catalyst support comprises an α-alumina molding product having 0.3 μm-4.0 μm average pore diameter and 0.01 cc/g to 15 cc/g pore volume. (2) This catalyst is obtained by supporting silver or silver and one or more of cesium and rhenium on a catalytic component. (3) This method for producing the catalyst support comprises using α-alumina having the shape of octahedron or polyhedron, 2 μm to 20 μm average particle diameter and the ratio of 1/2.D50 to 2.D50 of ≥90 wt.% when the average particle diameter is D50 as a raw material, mixing the raw material with water and/or a polymer binder and/or an inorganic binder, molding the mixture to give a raw molding product and drying or heating at 1,000 to 1,800°C to give the α-alumina molded product.