Abstract: An edge type back light module and a display device using the same are provided. The edge type back light module includes a light guide plate (LGP), a light source and a frame. The LGP has a light-receiving surface, a light-emitting surface and a light-reflecting surface opposite to the light-emitting surface. The light-emitting surface faces the display panel. The light source is adjacent to the light-receiving surface for emitting a light. The frame has a frame surface and a light guide portion. After a portion of the light contacts the light guide portion, the light guide portion disposed on the frame surface guides the portion of the light to be emitted from the light-emitting surface. A predetermined angle is contained between the outgoing direction of the portion of the light emitted from the light-emitting surface and the normal direction of the light-emitting surface.