To provide an exhaust emission control device for reducing remains of urea water in an injection hole and clogging of an injection hole owing to the remains regardless of temperature of exhaust emission.

An injector 11 for injecting the urea water to the exhaust emission flowing through an exhaust emission passage 15 injects the urea water from the injection hole and then injects compressed air from the same injection hole. Thus, the urea water remaining in the injection hole when injecting the urea water is removed from the injection hole by the air injected thereafter. Thus, after finishing injection of the urea water from the injector 11 following operation stop of an internal combustion engine 14, remains of the urea water in and around the injection hole and precipitation of crystal of urea originated from the remains of the urea water are reduced. Hence, it is possible to reduce clogging of the injection hole by the precipitated crystal of urea regardless of the temperature of the exhaust emission or the operation state of the internal combustion engine 14 and to secure sure injection of the urea water.