A light source module, comprising: a first optical layer having a first surface, a second surface opposite to the first surface, and a first optical pattern on the first surface or the second surface; a second optical layer having a third surface facing the second, a fourth surface opposite to the third surface, and a second optical pattern on the third surface or the fourth surface; a light guide layer on the first optical layer; and a light source part (11, 12) supplying an incident beam into the light guide layer, wherein the first optical pattern comprises a plurality of pattern units sequentially arranged and having each an inclined surface having an inclination angle with respect to the first surface or the second surface, wherein the pattern units guide the incident beam to a first surface direction to which the first surface faces, or a second surface direction to which the second surface faces through refraction and reflection of the inclined surfaces, thereby converting the incident beam into a line shaped beam, characterized in that the light source module comprises a first area in which the first optical layer overlaps with the second optical layer and a second area in which the first optical layer does not overlap with the second optical layer based on a plane view in the first surface direction or second surface direction, and an angle between the extending direction of the pattern units of the first optical layer and the extending direction of the pattern units of the second optical layer comprises an acute angle larger than zero degrees, wherein the condensing performance of the first area is greater than that of the second area. a first optical layer having a first surface, a second surface opposite to the first surface, and a first optical pattern on the first surface or the second surface; a second optical layer having a third surface facing the second, a fourth surface opposite to the third surface, and a second optical pattern on the third surface or the fourth surface; a light guide layer on the first optical layer; and a light source part (11, 12) supplying an incident beam into the light guide layer, wherein the first optical pattern comprises a plurality of pattern units sequentially arranged and having each an inclined surface having an inclination angle with respect to the first surface or the second surface, wherein the pattern units guide the incident beam to a first surface direction to which the first surface faces, or a second surface direction to which the second surface faces through refraction and reflection of the inclined surfaces, thereby converting the incident beam into a line shaped beam, characterized in that the light source module comprises a first area in which the first optical layer overlaps with the second optical layer and a second area in which the first optical layer does not overlap with the second optical layer based on a plane view in the first surface direction or second surface direction, and an angle between the extending direction of the pattern units of the first optical layer and the extending direction of the pattern units of the second optical layer comprises an acute angle larger than zero degrees, wherein the condensing performance of the first area is greater than that of the second area.