A backlight keyboard (100) includes a plurality of keys (120), a light guide plate (140), and an elastic element (160). Each key includes a key cover (124) and a keypad (122) integrally connected to each other. Further, keypad portions of adjacent keys are integrally connected, as well. The light guide plate is arranged below the keys. The light guide plate defines a plurality of through holes (142), each through hole corresponding to one key. An opaque film (144) is coated on a top surface of the light guide plate. The elastic element is positioned under the light guide plate and is configured for exerting a biasing force on at least one key so as to enable the key to return to its previous position when pressed and released.