A biological information measurement device includes: a device main body and a band mounted on the device main body by a connection portion, wherein the device main body and the band are connected with a miter joint, oblique sides are provided at end portions of the device main body to which the band is connected and the connection portion, and the band is connected to the device main body with the oblique side on the device main body side and the oblique side on the connection portion side facing each other.
