Provided is a method for producing 1,2-difluoroethylene, the method being capable of producing 1,2-difluoroethylene with high selectivity. The method for producing 1,2-difluoroethylene according to the present disclosure comprises performing a dehydrochlorination reaction of 1-chloro-1,2-difluoroethane in the presence or absence of a catalyst. The dehydrochlorination reaction is a gas phase reaction or a liquid phase reaction. The production method according to the present disclosure is capable of producing 1,2-difluoroethylene with high selectivity.