Abstract: patients with stomach cancer and 50 healthy subjects were investigated with behavioral charecteristic questionnaire,life event scale and ability of immune including RB C-C_(3b)R、REC-IC、RCIA、CIC and C_3 in lab.The result revealed:(1)the group of patients had more depression,anxiety,inward anger and control;significantly less outward anger,less optimistic and less social support compared with the group of healthy subjects;(2)76% of the patients within 8 years before diagnosis and 62% of the patients within 3 years had life events;(3)the group of patients had significantly lower RBC-C_(3b)R and more RCIA and CIC compared with the group of healthy subjects.Through analysis one can conclude that the development of stomach cancer is related with some behavioral charecter especially with depression and inward anger;life event as a stress resource can induce stomach cancer;the machanism might be related with the immune system.

Key words: psychosomatic disease, type c behavioral pattern, life event, immune, stomach cancer