The present study purposed to evaluate the common personality traits of the 82 Korean Makalu Expedition members by the psychological tests. The main psychological tests used to this study were minnesota Multiphasic personality Inventory, Rorschach test, and Korean Wechsler Intelligence test. The results obtained were as follow; 1) The resistance toward psychological evaluations was unexpectedly intense. 2) As a whole the level of intelligence ability was high : very superior level with 6 subjects and bright normal level with 2 subjects. 3) The basic response style was generally introversive. 4) The considerable resources were not well organized. 5) The affective experiences and expressions were insufficiently organized. 6) The intense dependent need of the interpersonal relationship was inhibited so that the intimate interpersonal relationship was avoided. 7) The self evaluation was generally low because of conflict with the ideal self imag and real self image. 8) The subjects consciously belonged to normal group but latently showed underlying depression and inner conflicts.