Patent ID: 8439848

Claim:
A blood test apparatus comprising: a housing; a laser emitting device that is provided in the housing such that the laser emitting device does not contact skin to be punctured, that punctures skin with laser light, and that has a convex lens; a blood sensor that analyzes blood exuding from the punctured skin; a holder that holds the blood sensor; a negative pressure chamber that is provided in the holder and through which the laser light from the laser emitting device penetrates; a negative pressure creater that creates a negative pressure in a negative pressure space hermetically sealed between the skin and the negative pressure chamber; and a cover that is removably mounted to the negative pressure chamber, that is removable independently of the blood sensor and that is disposed at a position closer to the laser emitting device than is the blood sensor, wherein the cover includes: a cylindrical member that surrounds an optical axis of a laser light from the laser emitting device; a cover member that is disposed at an end of the cylindrical member facing the laser emitting device, that extends traverse to the path of the laser light and that is positioned so that the laser light passes through the cover member; and a communication path that communicates between an inside of the cylindrical member and the negative pressure chamber.