The purpose of the present invention is to provide a biological information measurement device that is readily attached to a finger and is capable of reducing the load on a subject caused by attachment to a finger for long periods. In order to achieve said aim, the biological information measurement device comprises: a main section and an attachment section fixed to the main section, for sandwiching the finger of an organism. The biological information measurement device includes a light source unit and a light-receiving unit facing each other having interposed therebetween an area wherein the finger is arranged when the finger is sandwiched by the attachment section. In addition, the main section has an electric circuit including a signal processing unit, and a power supply unit and the signal processing unit obtains a digital value relating to the pulse wave from a signal output from the light-receiving unit as a result of the light-receiving unit receiving light that has been generated from the light source unit and has passed through the finger. A first length in the longitudinal direction of the main section is longer than a second length of the attachment section in said longitudinal direction.La présente invention concerne un dispositif de mesure dinformations biologiques qui est aisément fixé à un doigt et est capable de réduire la charge pour un sujet causée par la fixation à un doigt pendant de longues périodes. Afin datteindre ledit objectif, ledit dispositif de mesure dinformations biologiques comprend : une section principale et une section de fixation fixée à la section principale, pour prendre en sandwich le doigt dun organisme. Le dispositif de mesure dinformations biologiques comprend une unité de source de lumière et une unité de réception de lumière se faisant mutuellement face ayant, intercalée entre celles-ci, une zone dans laquelle le doigt est agencé lorsque le doigt est pris en sandwich par la section de fixation. De plus, la section principa
