The invention provides a syringe which can inhibit the decomposition of hydrogen peroxide. The invention provides a syringe, and the part of the syringe in direct contact with the hydrogen peroxide solution is made of cyclic olefin polymer (COP) or cyclic olefin copolymer (COC).本發明提供一種注射器,該注射器可抑製過氧化氫的分解。本發明提供一種注射器,注射器與過氧化氫溶液直接接觸的部分的注射器材質為環烯烴聚合物(COP)或環烯烴共聚物(COC)。