The present invention discloses an auxiliary device for an endoscopy. The auxiliary device for an endoscopy includes a pipe and a clamping unit. The clamping unit has a tube and a connector. The connector is connected to the pipe. The tube is configured to clamp a capsule endoscopy. The tube defines a inner space configured to accommodate a part of the capsule endoscopy. The tube includes an first opening section, a second opening section and a third opening section. The first opening section extends toward a second end of the tube from a first end of the tube for a first distance. The second opening section extends toward the second end of the tube from a first end of the tube for a second distance. The third opening section extends toward the second end of the tube from a first end of the tube for a third distance. The first opening section, the second opening section and the third opening section are separated from each other, and the first distance is greater than the second distance and the third distance.
