Scanning device and bill authentication equipment using same

The utility model provides a scanning device and bill authentication equipment using the same. The scanning device comprises a machine frame, an image sensor and a light source assembly, wherein a conveying channel is arranged on the machine frame, the image sensor is arranged on a first side of the conveying channel, the light source assembly is arranged on a second side of the conveying channel and is opposite to the image sensor, and the light source assembly is movably connected with the machine frame and can move along the height direction of the conveying channel to be close to or far away from the image sensor. Since the light source assembly can move along the height direction of the conveying channel, a bill is always pressed on the image sensor by the light source assembly regardless the thickness of the bill when the bill passes between the light source assembly and the image sensor, thus the problem in the prior art that the scanning effect of the image sensor is affected because a gap exists between the bill and the image sensor due to small thickness of the bill, the surface of the bill is uneven or the bill shakes is solved, therefore, the scanning device can adapt to bills with different thickness.