The invention provides a throat detector. The throat detector comprises a nipple-shaped part consisting of a blocking piece and a sucking part, wherein the blocking piece is provided with a first side and a second side which are opposite to each other, the sucking part is arranged on the first side, a lens of a camera device penetrates into the sucking part through a through hole in the blocking piece, and a handheld part arranged at the tail end of the lens is connected with the second side of the blocking piece; during diagnosis and treatment, the sucking part is placed in the mouth of an infant, then the throat of the infant can be photographed, the angle of the lens is adjusted by the handheld part, images recorded by the camera device are transmitted in a wired or a wireless manner to a display device, and a doctor diagnoses the infant according to the images.