PROBLEM TO BE SOLVED: To provide a biological information processing device capable of specifying a line element that can be erroneously extracted as a vein from a vein image of a hand.SOLUTION: A biological information processing device 1 includes a positioning part (13) for positioning a hand on a first vein image obtained by looking at a vein pattern of one hand between a right hand and a left hand from one side between the palm side of the hand and the back side of the hand to a hand on a second vein image obtained by looking at a vein pattern of the other hand between the right hand and the left hand from the other side between the palm side of the hand and the back side of the hand, and a coincidence determination part (14) for specifying a line element among a plurality of line elements on the first vein image, being coincident with one of a plurality of line elements on the second vein image.【課題】手の静脈画像から、静脈と誤って抽出され得る線要素を特定できる生体情報処理装置を提供する。【解決手段】生体情報処理装置１は、右手と左手のうちの一方の手の静脈パターンを手のひら側又は手の甲側のうちの一方の側から見た第１の静脈画像上の手と右手と左手のうちの他方の手の静脈パターンを手のひら側又は手の甲側のうちの他方の側から見た第２の静脈画像上の手を位置合わせする位置合わせ部（１３）と、第１の静脈画像上の複数の線要素のうち、第２の静脈画像上の複数の線要素の何れかと一致する線要素を特定する一致判定部（１４）とを有する。【選択図】図２
