Provided is a device for delivering a brain drug through the nasal cavity. The device for delivering a brain drug through the nasal cavity includes a drug delivery tube having a medicament hollow through which drug delivered to the brain flows through the nasal cavity of an experimental animal, a round shape at one end, and an injection port for injecting the drug; and an adaptor, into which the drug delivery tube is drawn, providing a path for the drug delivery tube to be inserted into the nasal cavity of an experimental animal.
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