The clinical features of Guillain-Barré syndrome (GBS) are progressive, fairly symmetric muscle weakness, and patients present a few days to a week after onset of symptoms. A 63-y-old man strongly hit his forehead, and next day felt paresthesia in both upper limbs, with difficulty in walking. Spinal cord injury (SCI) was suspected; the cervical cord was severely compressed at the C4 level. He was diagnosed with central cervical SCI and transferred to a community hospital. Three days after the injury, oxygenation worsened, and the patient was transferred to our hospital for laminoplasty. After admission, we noticed bilateral ptosis—an atypical finding for SCI. Under analgesic sedation, he could only move his fingertips. Severe respiratory muscle weakness and absence of reflexes were observed. Moreover, albuminocytologic dissociation and decreased motor nerve conduction were observed, and GBS was suspected. Intravenous immunoglobulin was administered; thereby, the muscle weakness gradually improved, and the patient returned to work. Muscle weakness usually starts in the legs in GBS; however, in 10% of patients, it starts in the arms. In our patient, the symptoms started with paresthesia, followed by severe respiratory muscle weakness in a short period. Furthermore, intubation made history-taking and neurological examination difficult. The degree of inflammation in the acute GBS phase correlates with the severity of nerve injury. Therefore, early diagnosis and treatment of GBS is important. We should perform detailed history-taking and consider GBS as a differential diagnosis, especially when neurological examination cannot be performed at the emergency department.