amplitude of task-related power changes of EEG during motor imagery was recorded to assess the downstream modulation of primary sensorimotor cortex. Our result depicts clear gating of both N20 and N30 components by motor imagery. Inter-subject analysis with healthy nine participants revealed that amplitude of N30 gating was correlated with the amplitude of alpha/beta band (8–35 Hz) EEG attenuation. This result indicates that alpha/beta band EEG attenuation during motor imagery represents the binding process of kinesthetic sensory and motor information, and thus is influenced by supplementary motor area or/and premotor cortex, known as possible actors of N30. Research fund: the Ministry of Education, Culture, Sports, Science and Technology Strategic Research Program for Brain Science (H19-24).