The present invention continuously acquires information on the pulse wave and blood pressure of a measurement subject. The present invention is a biological information reading device that is used stuck to a living body and that is provided with: a biological information acquiring unit that is stuck to the living body and that acquires biological measurement information and a computing unit that, on the basis of the biological measurement information acquired by the biological information acquiring unit, performs computations that generate biological information. The biological information acquiring unit has: a light-emitting element that emits polarized light as outbound light a transmission film through which the outbound light that is emitted from the light-emitting element enters skin a light-receiving element that receives return light that has been transmitted through the transmission film, has been reflected inside the skin, and has been transmitted back through the transmission film and a 1/4 wavelength plate that is provided at a site through which the outbound light and the return light pass and that changes the polarization characteristics of passing outbound light and return light.
