The present invention discloses a spectacle-type brain activity sensor for detecting a brain wave of cerebral cortex. The spectacle-type brain activity sensor comprises a spectacle structure and an electroencephalogram electrode arranged on the spectacle structure, and the spectacle structure is provided with at least one nose pad and two spectacle legs, wherein the spectacle structure is mounted on the head of a user by supporting the at least one nose pad with the nose of a user and supporting the two spectacle legs with auricles of the user, so that the electroencephalogram electrode is in contact with a V-shaped depression between one of the auricles and the head and/or the skin on the back of the auricle, and furthermore, an electroencephalogram signal can be favorably obtained through the electroencephalogram electrode.本發明揭示一種用以偵測大腦皮質腦波的眼鏡式腦部活動感測器,其包括一眼鏡結構,且該眼鏡結構具有至少一鼻墊以及二鏡腳,以及具有一腦電電極設置於其上,其中,該眼鏡結構藉由一使用者的鼻子支撐該至少一鼻墊,以及該使用者的耳廓支撐該二鏡腳而設置於該使用者的頭部,以使該腦電電極接觸其中一耳廓與頭顱間的一V型凹陷及/或該耳廓的背面皮膚,進而利於透過該腦電電極而取得腦電訊號。200‧‧‧活動偵測電極202‧‧‧參考電極
