The utility model relates to a scanning device for obtaining rectum or vaginal wall image, it is including being cylindrical casing, scanner and being used for doing the supply circuit of scanner power supply, scanner fixed mounting in the casing, the lateral wall of casing is equipped with a transparent window, transparent window sets up along the length direction of casing, transparent window does the scan window of scanner, a circular -arc arch is upwards extended and forms at the top of casing. The utility model discloses a clinical diagnosis and physical examination provide a convenience, safe, painless and simple diagnostic apparatus tool, can realize the meticulous inspection to rectum and vaginal wall fast to the examination goes out early disease, like ulcer and tumour, ensure that the patient obtains early treatment.