Built-in type scanner structure

The utility model relates to a built-in type scanner structure. The utility model adopts a program of instant input and output, without element extracting and file positioning. The utility model is arranged in an inserting slot of a front panel of a mainframe casing of a computer; the utility model is composed of a box type casing, a file feeding unit, a drive unit, an image taking unit, a light source, an I/O port and a control unit, wherein, the file feeding unit comprises a feeding roller, an outer guide plate, an inner guide plate, and a gap between the outer guide plate and the inner guide plate is the passage for file feeding. The utility model has the advantages of convenient application, space saving, low cost and good integral function of a computer image system.