The present invention provides a measurement chip for a surface plasmon
resonance biosensor, which comprises a transparent substrate, a metal
membrane located on the transparent substrate and an organic silicon
membrane immobilized on the metal membrane and in which the organic
silicon membrane is immobilized on the metal membrane via a functional
group capable of binding with atoms on the surface of a metal. The
measurement chip for a biosensor of the present invention can easily be
produced. Using the measurement chip of the present invention, a target
substance can be measured with good sensitivity, even if only a small
amount of physiologically active substance is immobilized.
