An assembly for a vehicle comprising a lighting device provided to a vehicular interior part to illuminate a first portion and a second portion of the vehicular interior part that are to be illuminated, the lighting device comprising: a light source; a panel member formed in an elongated shape and configuring a part of the vehicular interior part; a light guide member formed in an elongated shape and provided to the panel member and including a light entrance portion and a light exit portion, the light entrance portion which light from the light source enters and the light exit portion extending in a longitudinal direction of the panel member and from which the light entering the light entrance portion exits; a first light transmission portion (54B1) provided in the panel member and through which the light exiting from the light exit portion transmits toward the first portion to be illuminated; and a second light transmission portion (54B2) provided in the panel member to be farther away from the light source than the first light transmission portion (54B1) and through which the light exiting from the light exit portion transmits toward the second portion to be illuminated, the second light transmission portion (54B2) and the second portion extending along a longitudinal direction of the light exit portion, wherein the light guide member and the second portion are provided to be closer to each other in the compartment inner-outer direction as they are farther away from the light source, and wherein the panel member has a projected wall portion projecting to a vehicular compartment inner side, the projected wall portion extends along the longitudinal direction of the light guide member, the light guide member extends along the compartment outer side of the projected wall portion, and characterized in that the projected wall portion J is projected such that a projected end is inclined toward a vehicular compartment outer side as is farther away from the light source, and the light guide member extends so as to be closer to the vehicular compartment outer side as is farther away from the light source. a light source; a panel member formed in an elongated shape and configuring a part of the vehicular interior part; a light guide member formed in an elongated shape and provided to the panel member and including a light entrance portion and a light exit portion, the light entrance portion which light from the light source enters and the light exit portion extending in a longitudinal direction of the panel member and from which the light entering the light entrance portion exits; a first light transmission portion (54B1) provided in the panel member and through which the light exiting from the light exit portion transmits toward the first portion to be illuminated; and a second light transmission portion (54B2) provided in the panel member to be farther away from the light source than the first light transmission portion (54B1) and through which the light exiting from the light exit portion transmits toward the second portion to be illuminated, the second light transmission portion (54B2) and the second portion extending along a longitudinal direction of the light exit portion, wherein the light guide member and the second portion are provided to be closer to each other in the compartment inner-outer direction as they are farther away from the light source, and wherein the panel member has a projected wall portion projecting to a vehicular compartment inner side, the projected wall portion extends along the longitudinal direction of the light guide member, the light guide member extends along the compartment outer side of the projected wall portion, and characterized in that the projected wall portion J is projected such that a projected end is inclined toward a vehicular compartment outer side as is farther away from the light source, and the light guide member extends so as to be closer to the vehicular compartment outer side as is farther away from the light source.