Target substance detection device and target substance detection method using magnetic field and gravity

Abstract

Provided is a target substance detection device that can detect a target substance accurately and efficiently and can be manufactured at low costs. A target substance detection device 10 includes: a liquid sample storage unit 15 that is partially or wholly formed of a transparent member, and includes a storage unit formed so as to be open at a top surface thereof and configured to store a liquid sample S containing a fluorescent substance and magnetic particles that form a conjugate with a target substance; a sensing plate 11 composed of a silicon flat plate whose bottom surface is a smooth surface, the bottom surface being joined to the top surface of the liquid sample storage unit 15; a light irradiation unit 12 configured to irradiate the bottom surface of the sensing plate 11 with light including an excitation wavelength of the fluorescent substance, via the liquid sample storage unit 15; and a magnetic field application unit 14 located on a top surface side of the sensing plate 11, and configured to move a permanent magnet in a direction having a vector component in a direction parallel to an in-plane direction of the bottom surface of the sensing plate 11 in a state in which a magnetic field is applied to the conjugate in the liquid sample S stored in the storage unit.

Dependencies are inferred from the claim text.