A blood analysis device wherein a carrying part blood attached thereto can be localized to thereby facilitate handling after using. When incorporating blood collected from the punctured skin, the blood is held in a skin-puncturing device or the like so that an uncontaminated holding area can be enlarged and the degree of freedom in handling can be increased. A blood analysis device which comprises a plate type device body having a blood collection port for incorporating blood and a ventilation hole formed at a certain distance apart in a face and a passage located inside for connecting the blood collection port to the ventilation hole, and a blood analysis section located within the passage for analyzing the blood having been incorporated via the blood collection port.
