A display module includes a display panel and a fingerprint sensor. The display panel includes a display region, a peripheral region next to the display region, an active device array substrate, and an opposite substrate. The fingerprint sensor is disposed in the peripheral region of the active device array substrate of the display panel. Besides, the fingerprint sensor includes a light guide element, a light source, and a photosensor array. The photosensor array is disposed on the active device array substrate. The light guide element is disposed over the photosensor array. The light source is disposed on a side surface of the light guide element or below the light guide element.