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Behavioral (RT, % of errors) and ERP correlates of attention and decision making cognitive functions have been studied during the saccade preparation. The “double step” (pulse – overshoot) scheme of visual stimulation has been used in 20 subjects. The pattern of saccade response (two or one saccades) depends on the completeness of attention and decision making stages to the moment of second stimulus switching on and on the level of motor readiness and prediction in the period of eye fixation. Both of these factors are reflected in parameters and topography of evoked potentials at the first stimulus switching on and slow negative waves in the period of expectation. In the case of double saccade response we suppose that potential P100 may be EEG-correlate of decision making. Obtained data suggest that the cognitive functions of attention and decision making are realized by fronto-parietal cortical neural networks including «top-down» mechanisms of saccade control and also fronto-media-thalamic- and thalami-parietal modulating systems. The pattern of saccade responses in double step scheme may be defined by direction of covert attention in the period of expectation