the present disclosure relates to a fuel injector for a diesel particulate filter , and more particularly , to a fuel injector for a diesel particulate filter which is capable of combusting and removing particulate matters included in the exhaust gas by injecting fuel into an exhaust gas discharge line . the present disclosure can prevent fuel from being frozen when fuel is intended to be injected into an exhaust gas line during the winter season or in a cold region , thereby allowing dpf regeneration to be smoothly carried out .