PROBLEM TO BE SOLVED: To provide a pulse wave detector having improved feeling of attachment to a wrist and ease of attachment and capable of accurately detecting a pulse wave.SOLUTION: A biological information measurement device which is used by being attached to a wrist comprises: a housing which contains a pulse wave detection unit for detecting a pulse wave from a radial artery of a subject, which is open on the ulna side of a wrist, and which can be wound along a circumferential direction of the wrist and a band part for fixing the housing to the wrist. The band part is formed of two bands 31, 32 which are belt-shaped components extending along the circumferential direction of the wrist, and which are formed of a band material having rigidity lower than that of the housing.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】手首への装着感と装着の容易性を向上させ、かつ、精度よく脈波を検出することのできる脈波検出装置を提供する。【解決手段】手首に装着して用いられる生体情報測定装置は、被測定者の橈骨動脈から脈波を検出する脈波検出部を収容し、手首の尺骨側が開放された、手首の円周方向に沿って巻き付け可能に構成された筐体と、筐体を手首に固定するためのバンド部と、を備える。バンド部は、手首の円周方向に沿って伸びる帯状で、かつ、筐体よりも剛性の低いバンド部材で構成された2本のバンド31、32により構成されている。【選択図】図4