The object is to acquire electroencephalogram of high resolution with fewer number of electrodes than usual. An electroencephalogram measurement apparatus comprising: a plurality of electrodes 110 attached on the scalp of a subject for acquisition of electroencephalogram signals of the subject and an electroencephalogram generation unit 150 for generating an electroencephalograms at locations of the scalp where the electrodes are attached and electroencephalograms at locations of the scalp where the electrodes are not attached.
