A door handle comprising: a casing inside which an accommodation space is provided; and a lamp unit disposed in the accommodation space, wherein: the lamp unit includes a light member, and a light guide that guides light emitted from the light member in a first predetermined direction and emits the guided light from a light output surface; the light output surface is positioned inside an outer surface of the casing wherein the light guide has a shape extending in a second predetermined direction; the casing includes a first panel and a second panel; and the light guide is held in the accommodation space defined between the first panel and the second panel in a direction perpendicular to the second predetermined direction, wherein a plurality of holding protrusions (10, 11) protruding toward the light guide are provided on each of the first panel and the second panel to be spaced apart from each other in the second predetermined direction; and the light guide is held between the first panel and the second panel with the holding protrusions (10, 11) being pressed against the light guide wherein the holding protrusions (10, 11) are provided on the first panel and the second panel such that the holding protrusions of the first panel and the holding protrusions of the second panel are positioned alternately in the second predetermined direction. a casing inside which an accommodation space is provided; and a lamp unit disposed in the accommodation space, wherein: the lamp unit includes a light member, and a light guide that guides light emitted from the light member in a first predetermined direction and emits the guided light from a light output surface; the light output surface is positioned inside an outer surface of the casing the lamp unit includes a light member, and a light guide that guides light emitted from the light member in a first predetermined direction and emits the guided light from a light output surface; the light output surface is positioned inside an outer surface of the casing wherein the light guide has a shape extending in a second predetermined direction; the casing includes a first panel and a second panel; and the light guide is held in the accommodation space defined between the first panel and the second panel in a direction perpendicular to the second predetermined direction, the light guide has a shape extending in a second predetermined direction; the casing includes a first panel and a second panel; and the light guide is held in the accommodation space defined between the first panel and the second panel in a direction perpendicular to the second predetermined direction, wherein a plurality of holding protrusions (10, 11) protruding toward the light guide are provided on each of the first panel and the second panel to be spaced apart from each other in the second predetermined direction; and the light guide is held between the first panel and the second panel with the holding protrusions (10, 11) being pressed against the light guide wherein the holding protrusions (10, 11) are provided on the first panel and the second panel such that the holding protrusions of the first panel and the holding protrusions of the second panel are positioned alternately in the second predetermined direction. a plurality of holding protrusions (10, 11) protruding toward the light guide are provided on each of the first panel and the second panel to be spaced apart from each other in the second predetermined direction; and the light guide is held between the first panel and the second panel with the holding protrusions (10, 11) being pressed against the light guide wherein the holding protrusions (10, 11) are provided on the first panel and the second panel such that the holding protrusions of the first panel and the holding protrusions of the second panel are positioned alternately in the second predetermined direction.