To obtain a carbonate in a high space time yield and high selectivity by reacting an alcohol with carbon monoxide and oxygen.
When a catalyst for producing a carbonate is utilized to produce a carbonate through oxidative carbonylation of an alcohol, the catalyst of this invention has a porous support (e.g. activated carbon) supporting at least one kind selected from a group consisting of (A) a copper halide (e.g. cupric chloride) and (B) formic acid or a formate (e.g. ammonium formate).