Rheumatoid meningitis, a central nervous system complication of rheumatoid arthritis, has low morbidity but poor prognosis without treatment. Contrast-enhanced meningeal lesions on one side of the brain on MRI and hyperintensity of the pia mater on FLAIR image are characteristic features and should trigger the suspicion of rheumatoid meningitis. Steroids are effective for treatment, and good outcomes can be obtained through early diagnosis and intervention.