PROBLEM TO BE SOLVED: To provide a back shape determining and classifying method for determining the most appropriate classification for a back shape of a subject to be determined among prescribed classifications and a back shape classifying and determining apparatus for automatically determining by using it.SOLUTION: The back shape classifying and determining apparatus 1 is equipped with: a storage part 11 which constitutes a back shape database storing back shape data, where concave and convex parts of a back surface of a human body are made into a function, by dividing into a plurality of clusters a back shape acquiring means for acquiring the back shape data where the concave and convex parts of the back surface of a subject to be determined are made into the function by measuring the back shape of the subject to be determined an operation processing part 11 equipped with a feature as a determining means for determining the cluster to which the back shape of a subject to be determined belongs from a distance between the back shape data of the subject to be determined and the back shape data included in the plurality of clusters and a display part 12 for displaying a report from the determination on the separation.COPYRIGHT: (C)2008,JPO&INPIT【課題】判定対象の背面形状に対して所定の分類中最も的確な分類を客観的に判定することができる背面形状判定分類方法及びそれを用いて自動的に判定を行う背面形状分類判定装置を提供することにある。【解決手段】背面形状分類判定装置1は、人体背面の凹凸を関数化した背面形状データを複数のクラスタに分けて記憶した背面形状データベースを構成する記憶部11と、判定対象の背面形状を測定して当該判定対象の背面の凹凸を関数化した背面形状データを取得する背面形状取得手段と、前記判定対象の背面形状データと前記複数のクラスタに含まれる背面形状データとの間の距離に基づいて前記判定対象の背面形状が属するクラスタを決定する判定手段としての機能を備えた演算処理部11と、分離判定に基づいてレポートを表示する表示部12とを備えている。【選択図】図1