Provided is a biological information measurement instrument including a flexible substrate having an elongated shape, a light emitting unit which radiates near-infrared light, a light receiving unit which detects light, and a light shielding film, in which the light emitting unit is on a surface side of the flexible substrate and provided in a first recess formed on the flexible substrate, the light receiving unit is on the surface side of the flexible substrate, spaced apart from the first recess, and provided in a second recess formed on the flexible substrate, the light shielding film has a light-transmitting property at portions at which the light receiving unit and the light-emitting unit are positioned, and is provided on the surface side of the flexible substrate, and the light shielding film, a light emitting surface of the light emitting unit, and a light receiving surface of the light receiving unit are configured to form one surface.
