Abstract: A biosensor includes: a base plate; an electrode layer located on a major surface of the base plate and including a first electrode pair; a spacer plate provided on the electrode layer, the spacer plate having a first opening and at least one partition located in the first opening and connected with a periphery of the first opening at one end so as to divide part of the first opening into two or more portions; a first reagent layer provided in each of the two or more portions of the first opening; and a cover plate having an entrance section including at least one entrance opening and provided on the spacer plate, the entrance section overlapping at least part of the first opening, wherein part of the first electrode pair is located in the two or more portions of the first opening of the spacer plate.

Abstract: A sample collection device includes a grip portion and a collection portion connected to the grip portion, wherein the collection portion includes a first surface and a capillary having a groove shape provided on the first surface and formed with openings at opposite ends thereof.

Abstract: A biosensor includes a base substrate; an electrode layer disposed on a main surface of the base substrate and including first and second electrode pairs, each pair including a working electrode and a counter electrode; a spacer substrate on the electrode layer and having first and openings, the first opening exposing a part of the first electrode pair and the second opening exposing a part of the second electrode pair; a first reagent layer containing a first reagent reactive with a sample and disposed in the first opening; a second reagent layer containing a second reagent reactive with the sample and disposed in the second opening; and a top cover substrate on the spacer substrate, the top cover substrate including an introduction portion having at least one introduction opening, the introduction portion overlapping a part of the first opening in the spacer substrate and a part of the second opening.