The present invention provides an oral disintegrating tablet containing nalfuraffin, dimethylaminoethyl methacrylate, methyl methacrylate copolymer, tocopherol polyethylene glycol succinate as an antioxidant, and sodium lauryl sulfate as a solubilizer.본 발명은 날푸라핀, 메타아크릴산디메틸아미노에틸·메타아크릴산메틸공중합체, 항산화제로서 토코페롤폴리에틸렌글리콜숙시네이트 및 가용화제로서 라우릴황산나트륨을 함유하는 구강붕해정을 제공한다.