The present invention provides a mental disorder analysis apparatus that can properly diagnose a mental disorder by reducing, to the extent possible, actions and the like on electroencephalograms from an external environment or the like of a test subject during the electroencephalogram measurement. The apparatus includes: a storage portion 101 in which sleep electroencephalogram information, which is information on electroencephalograms during sleep of a test subject, is stored; an analyzing portion 102 that performs analysis regarding presence or absence of a mental disorder using the sleep electroencephalogram information stored in the storage portion 101; and an output portion 104 that outputs a result of the analysis performed by the analyzing portion 102.
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