Substrate for biosensor, method for preparing the same, and biosensor comprising the same

The present invention relates to a biosensor substrate, a method for preparing the same, and a biosensor comprising the same. The biosensor substrate includes a substrate unit, and a reformation unit combining to the surface of the substrate unit and including a light-sensitive derivative. The biosensor substrate according to the present invention includes the reformation unit which selectively activates and deactivates by light, thereby effectively providing a biosensor for multiple diagnosis.