Patent ID: 8716762

Claim:
A biosensor kit comprising: a biosensor chip for measuring a value of an electric current in a field-effect transistor, the electric current generated when a detection target is allowed to react with a target recognition molecule immobilized onto a reaction field connected to the field-effect transistor; and a packing body which seals therein the biosensor chip and a desiccating agent, the packaging body being formed from a packing material having a metal film, wherein the biosensor chip has a mounting board, the field-effect transistor mounted on the mounting board, the reaction field formed on the mounting board for applying a gate potential to the field-effect transistor, and the target recognition molecule immobilized on the reaction field, the mounting board includes a first external connection terminal connected to a source electrode of the field-effect transistor, a second external connection terminal connected to a drain electrode of the field-effect transistor, and a third external connection terminal for applying a predetermined potential to the reaction field, and the reaction field on which the target recognition molecule immobilized is moisturized by a moisturizing member in the packing body sealing therein with the desiccating agent.