SENSOR CHIP FOR SURFACE PLASMON-FIELD ENHANCED FLUORESCENCE SPECTROSCOPY COMPRISING DIFFERENT BLOCKING AGENTS

An object of the present invention is to provide a sensor chip in which non-specific adsorption of contaminants originating from a measurement sample (biological sample) to a sensor section is effectively inhibited and the effect of blocking autofluorescence emitted by a dielectric member is not reduced with time. The sensor chip of the present invention is a sensor chip for surface plasmon-field enhanced spectroscopy that includes: a dielectric member; a metal thin film formed on a main surface of the dielectric member; and a region on a part of the metal thin film, where a capturing substance that specifically captures a substance to be measured is immobilized, wherein a blocking treatment with a blocking agent is performed in a region that includes the region where the capturing substance is immobilized and the blocking treatment is not performed over the entirety of a wetted surface between a measurement sample and the metal thin film.