A surface light source lighting device in which light is incident to an edge surface of a light guide plate from a light source so as to propagate through the light guide plate, and the light is emitted from a front surface of the light guide plate comprising the front surface and a rear surface, the device comprising: the light source including a plurality of light source elements which are disposed with an interval in a longitudinal direction of the edge surface of the light guide plate; a first light guide pattern having a linear groove group in a first oblique direction with respect to a light incidence direction from the light source, the first light guide pattern being formed on the rear surface of the light guide plate; and a second light guide pattern having a linear groove group in a second oblique direction which is different from the first oblique direction of the first light guide pattern on the rear surface of the light guide plate, light reflected by the first light guide pattern being reflected by the second light guide pattern, and emitted from the front surface of the light guide plate, characterized in that the light source lighting device further comprises: a light incidence portion including a light incidence lens which converts linear light incident from the light source into substantially parallel light; and a louver which absorbs light deviated from the parallel light in light having passed the light incidence lens and through which the light passes, wherein light having passed through the light incidence portion is incident to the edge surface of the light guide plate, and wherein the light incidence lens has curved surfaces on a side of the light source and on a side of the louver, and a length of the light incidence lens is smaller than a distance of a pitch of the light source elements of the light source. the light source including a plurality of light source elements which are disposed with an interval in a longitudinal direction of the edge surface of the light guide plate; a first light guide pattern having a linear groove group in a first oblique direction with respect to a light incidence direction from the light source, the first light guide pattern being formed on the rear surface of the light guide plate; and a second light guide pattern having a linear groove group in a second oblique direction which is different from the first oblique direction of the first light guide pattern on the rear surface of the light guide plate, light reflected by the first light guide pattern being reflected by the second light guide pattern, and emitted from the front surface of the light guide plate, characterized in that the light source lighting device further comprises: a light incidence portion including a light incidence lens which converts linear light incident from the light source into substantially parallel light; and a louver which absorbs light deviated from the parallel light in light having passed the light incidence lens and through which the light passes, wherein light having passed through the light incidence portion is incident to the edge surface of the light guide plate, and wherein the light incidence lens has curved surfaces on a side of the light source and on a side of the louver, and a length of the light incidence lens is smaller than a distance of a pitch of the light source elements of the light source. a light incidence portion including a light incidence lens which converts linear light incident from the light source into substantially parallel light; and a louver which absorbs light deviated from the parallel light in light having passed the light incidence lens and through which the light passes, wherein light having passed through the light incidence portion is incident to the edge surface of the light guide plate, and wherein the light incidence lens has curved surfaces on a side of the light source and on a side of the louver, and a length of the light incidence lens is smaller than a distance of a pitch of the light source elements of the light source.