To provide an anus diagnosis and examination device for flush toilet stool the user of which can easily examine and inspect its anus for bleeding indicating the occurrence of internal hemorrhoids, external hemorrhoids, anal fissures, rectal cancer, carcinoma of the colon and rectum, and polyp of the colon.

The anus diagnosis and examination device is constituted by providing a blood sensor 2 in the water storing section 3 of a Western style flush toilet stool 1 and an anus examining CCD camera 4 and an illuminator 5 on the internal surface of the stool 1 above the surface level of the water stored in the section 3. The sensor 2, camera 4, and illuminator 5 are connected to a controller equipped with a monitor 6.