A new type of heterogeneous catalyst, 'bipyridine containing aromatic polyamide' (poly( N,N'-bisphenylene-2,2'-bipyridine-4,4'-dicarboxylic amide, Bpya)-CuCl2, for dimethyl carbonate (DMC) synthesis by oxidative carbonylation of methanol in the liquid-phase reaction was investigated. This catalyst showed good performance thigh DMC yield and DMC selectivity), as in the case of poly(vinylpyridine) (PVP)-CuCl2. Bpya shows higher heat resistance than PVP, and thus Bpya-CuCl2 is considered to be more stable than PVP-CuCl2 under the reaction condition. Bpya-CuCl2 could be easily recycled after filtration, and actually similar activity was found after three repetitions. During the reaction, 20 similar to 30% of total CuCl2 was eliminated from the immobilized catalyst. Although the elimination of CuCl2 occurred considerably in the initial step, it became slight during the reaction. The characteristics of corrosion resistance of Bpya-CuCl2 was studied, and it became obvious that corrosion is closely related to the trend of CuCl2 elimination. From these results, we proposed two types of reaction mechanism for the reaction system.