Abstract: A light guide bar for improving external characteristics by inducing light projection through side surfaces. The light guide bar comprises: a main body in the shape of a bar having a predetermined length; a light incident surface to which light is incident from one side end portion in the lengthwise direction of the main body; a reflection surface for reflecting the incident light from the light incident surface to the inside of the main body; a projection surface for projecting the incident light from the light incident surface to the outside of the main body; and a light extraction pattern formed on the projection surface. The light guide bar, as configured above, induces the projection of light through the light projection surfaces at both side surfaces such that a dark area between the light guide bars can be removed in a backlight device so as to improve external characteristics.