An optical member, comprising: a light guide portion provided as a base substrate; a three-dimensional effect forming portion provided on a first surface of the light guide portion; and a multi-effect forming portion provided on a second surface of the light guide portion opposing the first surface of the light guide portion; a support member, a reflection portion, wherein the three-dimensional effect forming portion comprises a pattern layer made of a transparent material and having multiple main patterns protruding from a first surface of the pattern layer, the multiple main patterns being sequentially arranged on the first surface of the pattern layer in a first direction and each of the multiple main patterns having respective inclined surfaces with inclined angle with respect to the first surface of the light guide portion, wherein each of the inclined surfaces is a mirror like finishing surface, wherein the multiple main patterns redirect a portion of a beam propagating in the light guide portion by refraction and reflection from the inclined surfaces to leave the optical member by the first surface of the light guide portion or the second surface of the light guide portion, thereby creating a line-shaped beam of a first path crossing at right angles to each pattern extension direction of the multiple main patterns, wherein the multi-effect forming portion comprises multiple optical patterns sequentially arranged in a second direction crossing the first direction and configured for converting a single line-shaped beam of the first path into multiple line-shaped beams, characterized in the pattern layer being arranged such that the second surface of the pattern layer opposite to the first surface of the pattern layer is laminated with the first surface of the light guide portion, and the most protruding portions of the multiple patterns of the one first surface of the pattern layer come into contact with the reflection portion, the reflection portion being disposed between the support member and the pattern layer, wherein in first portions reflective patterns being included between the reflection portion and the pattern layer, and wherein in second portions a reflective layer separation portion being provided between the reflection portion and the pattern layer, wherein the reflective layer separation portion is filled with air or a material having a different refractive index from that of the pattern layer. a light guide portion provided as a base substrate; a three-dimensional effect forming portion provided on a first surface of the light guide portion; and a multi-effect forming portion provided on a second surface of the light guide portion opposing the first surface of the light guide portion; a support member, a reflection portion, wherein the three-dimensional effect forming portion comprises a pattern layer made of a transparent material and having multiple main patterns protruding from a first surface of the pattern layer, the multiple main patterns being sequentially arranged on the first surface of the pattern layer in a first direction and each of the multiple main patterns having respective inclined surfaces with inclined angle with respect to the first surface of the light guide portion, wherein each of the inclined surfaces is a mirror like finishing surface, wherein the multiple main patterns redirect a portion of a beam propagating in the light guide portion by refraction and reflection from the inclined surfaces to leave the optical member by the first surface of the light guide portion or the second surface of the light guide portion, thereby creating a line-shaped beam of a first path crossing at right angles to each pattern extension direction of the multiple main patterns, wherein the multi-effect forming portion comprises multiple optical patterns sequentially arranged in a second direction crossing the first direction and configured for converting a single line-shaped beam of the first path into multiple line-shaped beams, characterized in the pattern layer being arranged such that the second surface of the pattern layer opposite to the first surface of the pattern layer is laminated with the first surface of the light guide portion, and the most protruding portions of the multiple patterns of the one first surface of the pattern layer come into contact with the reflection portion, the reflection portion being disposed between the support member and the pattern layer, wherein in first portions reflective patterns being included between the reflection portion and the pattern layer, and wherein in second portions a reflective layer separation portion being provided between the reflection portion and the pattern layer, wherein the reflective layer separation portion is filled with air or a material having a different refractive index from that of the pattern layer.