Flat fingerprint gatherer

The present utility model provides a flat fingerprint gatherer which comprises an upper cover, a shell, an acquisition prism, a light source, an imaging device, a circuit board and a pedestal. The gatherer is characterized in that the light source is arranged on the side surface of the acquisition prism, light enters form the side surface of the acquisition prism and used for reflecting collected fingerprint images to the imaging device for imaging though a first reflection surface, a second reflection surface and a light emitting surface; the light source is arranged on the side surface of the acquisition prism, uniformity of light shining on the acquisition surface is better, halation of dark background environment destroying fingerprint imaging will not be generated, thus the effect of dry finger imaging is good. The light source is arranged on the side surface of the acquisition prism, thickness of the fingerprint gatherer is reduced, the whole volume of the fingerprint gatherer is reduced, a miniaturizat