Biological information measuring device

A biological information measuring device, comprising:

• a band-shaped band member, worn so as to surround a measured part comprising an artery of a living body;
• a pressing member, disposed on a surface of the band member that faces the measured part, expanding due to injection of a fluid during blood pressure measurement and pressing the measured part;
• and
• at least one antenna support member, installed on a portion of the surface of the band member that faces the measured part, where the pressing member is not disposed, in a state in which the band member is worn on and is in contact with the measured part, wherein
• the at least one antenna support member has an antenna element transmitting a measurement signal composed of a radio wave to the measured part and receiving a reflection signal of the measurement signal from the measured part.