An illumination device comprising: a first light source for emitting light; and a light guiding lens for receiving the light from the first light source and for guiding the light to project light, wherein the light guiding lens includes a first light emission portion in a plate shape that extends in a predetermined direction and has a main surface with a plurality of reflecting cuts formed therein, and a first light guiding portion provided to the first light emission portion at an end portion thereof in the predetermined direction, the first light guiding portion projects more than the first light emission portion in a thickness direction of the first light emission portion and extends along the end portion of the first light emission portion, the first light source is disposed to face to a portion of an end face of the first light guiding portion in an extending direction in which the first light guiding portion extends, the portion of the end face projecting more than the first light emission portion in the extending direction, wherein the predetermined direction, the extending direction, and the thickness direction are perpendicular to each other, a portion of an end face of the first light guiding portion in the predetermined direction disposed at a position in the predetermined direction of the first light emission portion has a plurality of reflecting cuts arranged side by side in the extending direction and extending in the thickness direction as much as the first light emission portion does, the first light source shines light in the extending direction, characterized in that the light guiding lens includes a second light emission portion in a plate shape that extends in the predetermined direction and has a main surface with a plurality of reflecting cuts formed therein, the second light emission portion bends and is inclined to a side where the first light guiding portion projects with respect to the first light emission portion so as to extend along the other end portion of the first light emission portion in the extending direction and be connected to the other end portion, the first light guiding portion includes the other end portion in the extending direction to be connected to the second light emission portion, and the other end face of the first light guiding portion includes a reflecting face that is opposite of the first light source, is bent and inclined, generally has the same shape as the second emission portion, and can internally reflect light, which has been guided through the first light guiding portion in the extending direction, in the predetermined direction toward the second light emission portion. a first light source for emitting light; and a light guiding lens for receiving the light from the first light source and for guiding the light to project light, wherein the light guiding lens includes a first light emission portion in a plate shape that extends in a predetermined direction and has a main surface with a plurality of reflecting cuts formed therein, and a first light guiding portion provided to the first light emission portion at an end portion thereof in the predetermined direction, a first light emission portion in a plate shape that extends in a predetermined direction and has a main surface with a plurality of reflecting cuts formed therein, and a first light guiding portion provided to the first light emission portion at an end portion thereof in the predetermined direction, the first light guiding portion projects more than the first light emission portion in a thickness direction of the first light emission portion and extends along the end portion of the first light emission portion, the first light source is disposed to face to a portion of an end face of the first light guiding portion in an extending direction in which the first light guiding portion extends, the portion of the end face projecting more than the first light emission portion in the extending direction, wherein the predetermined direction, the extending direction, and the thickness direction are perpendicular to each other, a portion of an end face of the first light guiding portion in the predetermined direction disposed at a position in the predetermined direction of the first light emission portion has a plurality of reflecting cuts arranged side by side in the extending direction and extending in the thickness direction as much as the first light emission portion does, the first light source shines light in the extending direction, characterized in that the light guiding lens includes a second light emission portion in a plate shape that extends in the predetermined direction and has a main surface with a plurality of reflecting cuts formed therein, the second light emission portion bends and is inclined to a side where the first light guiding portion projects with respect to the first light emission portion so as to extend along the other end portion of the first light emission portion in the extending direction and be connected to the other end portion, the first light guiding portion includes the other end portion in the extending direction to be connected to the second light emission portion, and the other end face of the first light guiding portion includes a reflecting face that is opposite of the first light source, is bent and inclined, generally has the same shape as the second emission portion, and can internally reflect light, which has been guided through the first light guiding portion in the extending direction, in the predetermined direction toward the second light emission portion.