The invention relates to a scanning device which comprises a shell, an upper shell board and a window transparent film. An optical component is arranged inside the shell to capture images and the shell is also provided with a first opening. The upper shell board is arranged on the shell and is provided with a second opening which corresponds to the first opening. A window transparent film is disposed on the first opening and is corresponding to the second opening. In which, the window transparent film is embedded into the second opening through the assembly of the shell and the upper shell board.