Test sample reading device and test sample reading method

A test sample reading method for reading, by a test sample reading device, a barcode provided on a test sample, wherein

• the barcode is read by a plurality of self-luminous barcode readers arranged so that irradiating light emitted from the self-luminous barcode readers entirely covers a surface provided with the barcode provided on a test sample and optical axes of the irradiating light are inclined in a horizontal direction at an angle greater than 0° in absolute value and in a vertical direction at an angle greater than 0° in absolute value with respect to normal vectors of a test surface of the test sample provided with the barcode,
• the test sample reading device comprises two or more of the barcode readers,
• the two or more barcode readers are arranged so that,
• an irradiation area obtained by combining the two or more of the barcode readers entirely covers the surface, and
• the two or more optical axes are deviated from all normal vectors of the test surface, and
• each of the optical axes is deviated from all the others of the optical axes.