CLAIMS 1. An analysis chip comprising:
a substrate main body having a plurality of reaction portions in which a selective binding substance selectively binding to a substance to be examined is immobilized;
a corner portion in which different straight lines or curved lines intersect with each other in a cross section in which a plane passing through a surface of the substrate main body on which the reaction portions are provided.is a cut surface;
a partition portion formed by applying water repellent treatment to the surface of the substrate main body on which the reaction portions are provided, the partition portion being configured to partition the reaction portions inside an outer edge formed by the surface, and
a connection portion having water repellency, the connection portion being configured to connect between a part of the partition portion and the corner portion.
2. The analysis chip according to claim 1, wherein
the corner portion is the outer edge of the surface of the substrate main body, and
the connection portion has one extension portion or a plurality of extension portions formed by applying water repellent treatment to the surface of the substrate main body on which the reaction portions are provided and extending from a part of the partition portion to at least a part of the corner portion.
3. The analysis chip according to claim 2, wherein
the substrate main body has a rectangular shape formed by the outer edge, and
the extension portion is in contact with a part of one

edge side out of four sides of the outer edge.
4. The analysis chip according to claim 2, wherein
the substrate main body has a rectangular shape formed by the outer edge, and
the plurality of extension portions are in contact with a part of different edge sides from each other out of four edge sides of the outer edge.
5. The analysis chip according to any one of claims 2 to 4, further comprising an indicator portion indicating a position of the extension portion.
6. The analysis chip according to claim 2, wherein the connection portion is a cutout portion being a part of the substrate main body, formed by cutting out a region from the outer edge of the substrate to the partition portion, and having the corner portion.
7. The analysis chip according to claim 1, further comprising a projection portion connected to a water repellent surface of the partition portion, the projection portion being configured to project from the substrate main body, wherein,
the corner portion is formed from a side surface along a projecting direction of the projecting portion by at least a top surface of the projection portion in the projecting direction and the side surface, the side surface being connected to the partition portion; and
a projecting length of the top surface of the projection portion from the substrate main body is longer than a protruding length of the water repellent surface of the partition portion from the substrate main body.

8. The analysis chip according to claim 7, wherein
the connection portion has one extension portion or a plurality of extension portions formed by applying water repellent treatment to the surface of the substrate main body on which the reaction portions are provided, extending from a part of the partition portion toward the outer edge of the substrate main body, and connected to the corner portion at an end portion of the projection portion opposite to an end portion of the projection portion connected to the partition portion; and
the projection portion is connected to the water repellent surface of the partition portion via the extension portion and includes one or more projection portions depending on number of the extension portion(s).
9. The analysis chip according to claim 7, wherein the projection portion is provided adjacent to a part of the partition portion.
10. The analysis chip according to claim 9, wherein
the partition portion has a rectangular shape formed by the outer edge;
the projection portion is in contact with a linear portion in the outer edge; and
the connection portion is integrally provided with the projection portion.
11. The analysis chip according to claim 9, wherein
the partition portion has a rectangular shape formed by the outer edge;
the projection portion is in contact with a corner portion in the outer edge; and

the connection portion is integrally provided with the projection portion.
12. The analysis chip according to claim 7, wherein the projection portion comprises a sheet-like member.
13. The analysis chip according to claim 7, wherein the projection portion is integrally formed with the substrate main body.
14. The analysis chip according to claim 1, further comprising a recessed portion having one end connected to a water repellent surface of the partition portion and having a recessed shape in the cross section of the substrate main body, wherein
the corner portion is formed by an end of an opening of the recessed portion.
15. The analysis chip according to claim 14, wherein
the connection portion has one extension portion or a plurality of extension portions formed by applying water repellent treatment to the surface of the substrate main body on which the reaction portions are provided, extending from a part of the partition portion toward the outer edge of the substrate main body, and connected to a part of the opening of the recessed portion at an end portion of the recessed portion opposite to an end portion of the recessed portion connected to the partition portion; and
the recessed portion is connected to the water repellent surface of the partition portion via the extension portion and includes one or more recessed portions depending on number of the extension portion(s).

16. The analysis chip according to claim 15, wherein the extension portion is connected to the water repellent surface of the partition portion and includes a water repellent surface extending from a part of a side that is a side surface of the recessed portion along a depression direction of the recessed portion and that is connected to the partition portion to a part of a side surface of the recessed portion different from the side via a bottom surface of the recessed portion in the depression direction of the recessed portion.
17. The analysis chip according to claim 16, wherein the extension portion is configured to form a part of the partition portion.
18. The analysis chip according to any one of claims 1 to 17, wherein the partition portion is configured to independently partition each of the reaction portions.
19. The analysis chip according to any one of claims 1 to 17, wherein the partition portion is configured to partition the reaction portions as each set of a plurality of reaction portions.
20. The analysis chip according to any one of claims 1 to 19, wherein the reaction portion has a recessed shape with respect to the surface of the substrate main body.