Facial nerve paralysis following delayed complication after trauma was rare and hard to find reason. After symptom of facial nerve paralysis was found, careful clinical and neuropathic investigation needed through electromyography and nerve conduction velocity. It is necessery to knowing that functional degenaration of nerve conduction was irresible or not. It is important to determine if palsy is already present after trauma or some later time because origin of viral infection or temperature change may possible.