Importance

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Abstract

There is provided a biosensor in which a spacer 6 having a cutout portion is bonded between at least first support 1 and a second support 8 to form a specimen supply path 7 through which a supplied specimen is sucked into a space between the supports 1 and 8, a reagent that reacts with a component in the specimen is placed in the specimen supply path 7, and an air hole 9 for promoting suction of the specimen is formed in the second support; wherein the air hole 9 is shaped such that a diameter y of an opening 91b at one surface of the second support 8 which faces the specimen supply path 7 is larger than a diameter x of an opening 91a at the other surface of the second support, and projecting parts 92a and 92b are formed at the peripheries of the openings 91a and 91b, respectively. Thereby, a sufficient amount of specimen can be sucked regardless of the viscosity of the specimen supplied to the biosensor, and further, the specimen is prevented from flowing over the air hole 9.

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First Claim