| 摘要 |
PROBLEM TO BE SOLVED: To measure and process a large number of samples at once, to measure with proper precision, and to reduce cost to enable disposable use due to its simple constitution. SOLUTION: This surface plasmon resonance sensor 20 is provided with a light guide panel 21 provided with a light reflecting face 21a, a light incident face 21b for making light beam get incident into the light reflecting face 21a, and a light-emitting face 21c for emitting reflected light of the light beam reflected by the light-reflecting face 21a. A metal thin film 23 for causing surface plasmon resonance, and a biochemical reaction detecting portion 24 provided on the metal thin film 23 to contact with a DNA sample 25, are provided in the light-reflecting face 21a. The surface plasmon resonance sensor 20 is also provided with a light-extracting part 22, arranged in the emitting face 21c of the light guide panel 21, and comprising a transparent thin film, such as resin having a refractive index which is higher than that of the light guide panel 21.
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