To provide a biochemical autoanalyzer for self-recognizing infallibly an incorrect reading such as reading a barcode for a rack and a barcode for a specimen container as a single piece of information when a reader reads information on a barcode.

Barcode labels 4 describing information for identifying a rack 2 are provided on the rack 2 that can contain multiple specimens. This biochemical autoanalyzer reads the content of the barcode labels 4 with a reading mean, and analyzes the specimens automatically. Multiple barcode labels 3 for the rack are provided in different places where the reading mean can read the labels 3.