This report, in the tradition of the search for the universal man or the mature genital character, presents the results of asking fourteen senior psychoanalysts, psychiatrists, and clinical psychologists at the Menninger Foundation to describe 'a personal acquaintance who was "mentally healthy"'. Similar reports from eighty-five students at Wayne University gave similar results. Five behavioral characteristics of a 'mentally healthy' person were abstracted from the reports: 1, he treats others as individuals, by identifying himself with them, accepting and understanding them; 2, he is flexible under both internal and external stress; 3, he obtains pleasure from many sources; 4, he sees and accepts self-limitations; and 5, he uses his capacities to fulfil personal needs in carrying out productive tasks.