The present invention relates to an autoantibody biomarker for diagnosing dementia and a kit for diagnosing dementia comprising the same. In particular, the present invention relates to an autoantibody biomarker that selectively recognizes Ataxia, Cerebellar, Cayman Type (ATCAY), NME/NM23 Family Member 7 (NME7) and Nucleolar Protein 3 (NOL3) which can be used for the diagnosis of dementia as the amounts thereof are specifically increased in the blood of a dementia patient compared to a normal person, and a diagnostic kit for diagnosing dementia comprising an antigen recognizing the same. The dementia diagnostic kit including the autoantibodies of ATCAY, NME7 and NOL3 which can be used as a marker for diagnosing dementia of the present invention can diagnose dementia very easily by using the blood of a patient, and thus can effectively be used for early diagnosis of dementia.
AUTOANTIBODY BIOMARKER FOR DIAGNOSING DEMENTIA AND METHOD FOR DIAGNOSING DEMENTIA BY USING SAME