We report a case of myocarditis complicating gastroenteritis caused by Campylobacter jejuni. The patient had an uncomplicated course and made a full recovery. Cardiac MRI was useful in securing an early diagnosis and establishing baseline heart function. Myocarditis should be considered in younger patients presenting with chest pain and elevations in serum troponin. The occurrence of myocarditis complicating Campylobacter jejuni gastroenteritis is reviewed.