Using the Multiphasic Personality Inventory (MPI) of Eysenck 100 patients with peptic ulcer were studied. The mean age of female patients was 46 years, that of males was 44 years. The studied males showed features of extroverted personality and neuroticism, but without psychic abnormalities. The studied women had, most frequently, normal psychic features, but frequent neuroticism with elements of anxiety and depression. Males more than females expressed the need for social acceptance of their behaviour.