Myalgias and arthralgias are a common symptom of influenza vi- ruses’ infection. Reactive arthritis due to influenza vaccination has been described. Here we report the case of a 40-year-old Greek patient with free history who suffered from reactive arthritis due to influenza A infection. He proved negative to other viral or bacterial infections or autoimmune diseases related to arthritis. The affected joints were typical of post-infectious arthritis. The patient responded well to corticosteroid administration. All the above led to the suggestion that our patient’s arthritis represents a rare case of re- active arthritis after influenza A virus infection.