To ascertain the nature of emotional stability in is necessary to comprehend the subject and dynamics of motives, experiences, cognitive processes in extremal situation. It cannot come to emotional self-regulation, manifestations of will-power or temperament. The study and control of emotional stability have to do with biological, psychological and social spheres of personality. The demonstration of emotional stability as a personal quality and as a psychic state enables one to find the ways of its increase, preservation and implementation in difficult situations.