The manifestations of temperament in terms of auditory evoked potentials generation due to realization of odd-ball paradigm were studied. The subjects were divided into two groups according to the coincidence of three questionnaires (formal-dynamic behavior characteristics questionnaire, structure of temperament questionnaire, Eysenck’s personality questionnaire) results.  Significant differences between groups in N2 wave amplitude and complex N2-P3 were found. There was a number of significant correlations of questionnaire data and evoked potentials parameters for the group with coincided questionnaire results; the other group showed much less correlations. The data obtained confirm the conditionality of the temperament by brain processes and point to the principal differences in psycho-physiological manifestations of temperament.