Biological information measurement device

A biological information measurement device which measures blood pressure of a subject and biological information different from the blood pressure, the biological information measurement device comprising:

• a belt portion which is wound around an outer circumference of a measurement target site of the subject and fixes the biological information measurement device to the measurement target site;
• a fluid bag which is arranged on an inner circumferential side of a support member;
• a pump which supplies a fluid into the fluid bag;
• a valve which is provided in a flow path of the fluid communicating with the fluid bag;
• a blood pressure measurement unit which compresses the measurement target site by supplying the fluid from the pump to inflate the fluid bag or releases compression on the measurement target site by controlling the valve to discharge the fluid in the fluid bag to contract the fluid bag, and measures a blood pressure of the measurement target site;
• a detection unit which comes into contact with the measurement target site of the subject and is configured to measure the biological information;
• and
• a biological information measurement unit which measures the biological information by using the detection unit,
• wherein the fluid bag includes a first bag portion and a second bag portion which are arranged apart from each other in a circumferential direction of the support member and communicate with each other, and
• the detection unit
• is supported by a detection unit support portion which is the support member exposed to an inner circumferential side between the first bag portion and the second bag portion, and
• is arranged at a position which allows a change in a contact state between the detection unit and the measurement target site due to movement of the detection unit support portion accompanying a volume change of the first bag portion and the second bag portion to be limited to a predetermined range, the position being a position separated by a first predetermined distance from a first end portion of the first bag portion on the detection unit side and separated by a second predetermined distance from a first end portion of the second bag portion on the detection unit side.