BIOLOGICAL SAMPLE ANALYSIS DEVICE

The present invention is one that intends to achieve improvements in both analysis efficiency and analysis accuracy without difficulty, and a biological substance analysis device 100 that analyzes light derived from a biological substance in a sample, and the biological substance analysis device 100 includes: a holder 3 that holds multiple containers 2 containing the sample; a photodetector 4 that is fixed at a predetermined position; a holder driving mechanism 5 that moves the holder 3 to position each of the containers 2 held in the holder 3 at a detection positon Xdetby the photodetector 4 in sequence; and a light shielding mechanism 13 that, while guiding light emitted from the sample in a container 2 at the detection position Xdetto the photodetector 4, prevents light emitted from the sample in the other containers 2 from being guided to the photodetector 4.