PROBLEM TO BE SOLVED: To provide a biological information measurement device capable of measuring highly accurate biological information, since a positional relation between a subject and a detector can be appropriately and stably held.SOLUTION: A biological information measurement device comprises: a light emitting section 150 emitting light to a subject a light receiving section 140 receiving the light passing through the subject a translucent member 50 transmitting the light and being brought into contact with the subject and a case section 30 having the translucent member 50 and being brought into contact with the subject. In a cross-sectional view in a direction perpendicular to a direction toward the translucent member 50 from the light emitting section 150, when a second surface 50b of the translucent member 50 facing a first surface 50a brought into contact with the subject of the translucent member 50 is defined as a reference, a distance from the second surface 50b to the first surface 50a is shorter than a distance from the second surface 50b to a surface (surface 30a having apexes of 52t1 and 52t2) brought into contact with the subject of the case section 30.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2018,JPO&INPIT【課題】被検体と検出部との位置関係が適切、且つ、安定して保持できることにより、高精度な生体情報を測定することが可能な生体情報測定装置を提供する。【解決手段】被検体に対して光を射出する発光部150と、被検体を経由した前記光を受光する受光部140と、前記光を透過し、被検体と接触する透光部材50と、透光部材50を有し、被検体と接触するケース部30と、を備え、発光部150から透光部材50に向かう方向と直交する方向からの断面視において、透光部材50の被検体と接触する第1面50aと向かい合う透光部材50の第2面50bを基準としたときに、第2面50bから第1面50aまでの距離は、第2面50bからケース部30の被検体と接触する面(頂部52t1,52t2の面30a)までの距離よりも短いことを特徴とする生体情報測定装置。【選択図】図6
