Water absorption state evaluation device and water absorption state evaluation method.

Problem to be solved. To provide a water absorption state evaluation device capable of reproducing evaluation of water absorption status of grains of rice to be measured based on the experience of experts. Solution. The water absorption state evaluation device includes: an image data acquisition unit 10 that acquires image data of a picked-up rice group to be measured consisting of grains of rice to be measured soaked in water; an image processing unit 11 capable of executing a series of predetermined processing on the image data acquired by the image data acquisition unit 10; an index determination unit 12 that is a functional part that determines the index related to the water absorption status of the rice group to be measured, which determines the area-weighted average brightness determined based on the image data picked up the rice group to be measured; and a water absorption status evaluation unit 13...