The biological information measuring device of the present invention comprises an insertion / extraction opening for inserting / removing a finger of a living body, a receiving space for accommodating the finger of the living body inserted from the insertion / removal opening, and a receiving space facing the accommodating space, And an abdomen receiving surface that receives an abdomen of the finger of the living body, wherein the mounting main body extends along an inserting and removing direction for inserting and removing a finger of the living body and is received by the abdominal receiving surface A pair of first finger displacement inhibiting portions which inhibit a finger of the living body from shifting in an orthogonal direction orthogonal to the insertion and removal direction are provided on both sides of the abdominal receiving surface in the orthogonal direction.本発明の生体情報測定装置は、生体の指を挿抜するための挿抜開口と、前記挿抜開口から挿入された前記生体の指を収容する収容空間と、前記収容空間に臨み、前記挿抜開口から挿入された前記生体の指における腹を受ける腹受け面とを形成した装着本体部を備え、前記装着本体部は、前記生体の指を挿抜する挿抜方向に沿って延び、前記腹受け面で受けられた前記生体の指が前記挿抜方向と直交する直交方向にずれることを阻害する一対の第1指ズレ阻害部を、前記直交方向における前記腹受け面の両側辺に備える。
