A lighting module comprising: a first light guide plate which comprises a top surface and a bottom surface, each of which emits light, and a one side and an other side facing each other; a second light guide plate which is disposed below the first light guide plate and comprises a top surface and a bottom surface, each of which emits light, and a one side and an other side facing each other; a reflector which is disposed between the first light guide plate and the second light guide plate; a light source (130a, 130b) which comprises first light emitting devices (132a-1, 132b-1) disposed on a side of the first light guide plate, and second light emitting devices (132a-2, 132b-2) disposed on a side of the second light guide plate; and case means (150A, 150B) in which the one and the other sides of the first and the second light guide plates (110a, 110b) are disposed and in which the light source (130a, 130b) is disposed, characterized in that: the case means (150A, 150B) comprise a first case in which the one sides of the first and the second light guide plates (110a, 110b) are disposed; and a second case in which the other sides of the first and the second light guide plates (110a, 110b) are disposed, and a distance on the top surface of the first light guide plate between the first case and the second case is different from a distance on the bottom surface of the second light guide plate between the first case and the second case. a first light guide plate which comprises a top surface and a bottom surface, each of which emits light, and a one side and an other side facing each other; a second light guide plate which is disposed below the first light guide plate and comprises a top surface and a bottom surface, each of which emits light, and a one side and an other side facing each other; a reflector which is disposed between the first light guide plate and the second light guide plate; a light source (130a, 130b) which comprises first light emitting devices (132a-1, 132b-1) disposed on a side of the first light guide plate, and second light emitting devices (132a-2, 132b-2) disposed on a side of the second light guide plate; and case means (150A, 150B) in which the one and the other sides of the first and the second light guide plates (110a, 110b) are disposed and in which the light source (130a, 130b) is disposed, characterized in that: the case means (150A, 150B) comprise a first case in which the one sides of the first and the second light guide plates (110a, 110b) are disposed; and a second case in which the other sides of the first and the second light guide plates (110a, 110b) are disposed, and a distance on the top surface of the first light guide plate between the first case and the second case is different from a distance on the bottom surface of the second light guide plate between the first case and the second case. the case means (150A, 150B) comprise a first case in which the one sides of the first and the second light guide plates (110a, 110b) are disposed; and a second case in which the other sides of the first and the second light guide plates (110a, 110b) are disposed, a first case in which the one sides of the first and the second light guide plates (110a, 110b) are disposed; and a second case in which the other sides of the first and the second light guide plates (110a, 110b) are disposed, and a distance on the top surface of the first light guide plate between the first case and the second case is different from a distance on the bottom surface of the second light guide plate between the first case and the second case.