An interior member for a vehicle, comprising: an interior member main body (10, 11, 12) forming an inner wall of a cabin; a linear light guide member configured to conduct light from a light source in a lengthwise direction and to irradiate the light from a side surface thereof; and a lens that transmits the light irradiated from the light guide member, the lens including a first wall extending along the light guide member, and a second wall and a third wall extending from either side edge of the first wall toward the light guide member; characterized in that: the lens extends along the light guide member, and is provided with a groove receiving the light guide member therein, the groove being defined by the first wall, the second wall and the third wall, the lens being further provided with a first engaging portion provided on a wall that defines the groove, and a second engaging portion provided on a wall that defines the groove, and the interior member main body (10, 11, 12) being provided with a first engaged portion engaged by the first engaging portion, and a second engaged portion engaged by the second engaging portion, the lens being resiliently deformable so as to bring the second wall and the third wall toward each other; wherein the interior member main body (10, 11, 12) is provided with an interior member recess receiving the light guide member and the lens therein, wherein the first engaging portion projects from a surface of the second wall facing away from the light guide member, and the first engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the first engaging portion therein, and wherein the second engaging portion projects from a surface of the third wall facing away from the light guide member, and the second engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the second engaging portion therein. an interior member main body (10, 11, 12) forming an inner wall of a cabin; a linear light guide member configured to conduct light from a light source in a lengthwise direction and to irradiate the light from a side surface thereof; and a lens that transmits the light irradiated from the light guide member, the lens including a first wall extending along the light guide member, and a second wall and a third wall extending from either side edge of the first wall toward the light guide member; characterized in that: the lens extends along the light guide member, and is provided with a groove receiving the light guide member therein, the groove being defined by the first wall, the second wall and the third wall, the lens being further provided with a first engaging portion provided on a wall that defines the groove, and a second engaging portion provided on a wall that defines the groove, and the interior member main body (10, 11, 12) being provided with a first engaged portion engaged by the first engaging portion, and a second engaged portion engaged by the second engaging portion, the lens being resiliently deformable so as to bring the second wall and the third wall toward each other; wherein the interior member main body (10, 11, 12) is provided with an interior member recess receiving the light guide member and the lens therein, wherein the first engaging portion projects from a surface of the second wall facing away from the light guide member, and the first engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the first engaging portion therein, and wherein the second engaging portion projects from a surface of the third wall facing away from the light guide member, and the second engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the second engaging portion therein. the lens extends along the light guide member, and is provided with a groove receiving the light guide member therein, the groove being defined by the first wall, the second wall and the third wall, the lens being further provided with a first engaging portion provided on a wall that defines the groove, and a second engaging portion provided on a wall that defines the groove, and the interior member main body (10, 11, 12) being provided with a first engaged portion engaged by the first engaging portion, and a second engaged portion engaged by the second engaging portion, the lens being resiliently deformable so as to bring the second wall and the third wall toward each other; wherein the interior member main body (10, 11, 12) is provided with an interior member recess receiving the light guide member and the lens therein, wherein the first engaging portion projects from a surface of the second wall facing away from the light guide member, and the first engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the first engaging portion therein, and wherein the second engaging portion projects from a surface of the third wall facing away from the light guide member, and the second engaged portion comprises a hole formed in a wall part of the interior member main body (10, 11, 12) defining the interior member recess so as to receive the second engaging portion therein.