24 patients (10 female and 14 male) with a histologically evident stomach cancer underwent a series of psychoanalytical interviews and psychological tests (TAT). The method consisted of an analysis of early childhood conditions, the structure of personality, the object relationships, as well as the psychic causes for the stomach cancer. Among the results was that the loss of one parent or an equivalent early loss was significantly more frequent in stomach cancer patients than in the average population. Their predominant sibling position was the so-called sandwich-position. In regard to the structure of personality a constantly persisting false assimilation of inner conflicts presents itself as the essential item of the premorbid structure. The initiating factor for the stomach cancer was a statistically significantly often experienced severe trauma based on a significantly often experienced object loss, especially during childhood, as well as on a family disposition in the relation of 1:50. In addition to that the following conspicuous features were responsible for the formation of the stomach cancer: A persisting problem of separation (Oedipus conflicts), a resignation in an apathetic reaction (excessive demands), an inability to release aggression in a "normal" way and a direction of the aggression against the person himself.