An illuminating device comprising: a light-emitting element; a substrate on which the light-emitting element is mounted; a reflective member; and a light-guiding member that guides light emitted from the light-emitting element toward an irradiated object and the reflective member, the illuminating device illuminating the irradiated object with light that has been emitted from the light-emitting element and guided to the irradiated object by the light-guiding member and with light that has been emitted from the light-emitting element, guided by the light-guiding member and reflected to the irradiated object by the reflective member, the light-emitting element and the reflective member being disposed to sandwich a path (St) through which light reflected by the irradiated object passes, and the light-guiding member being disposed on a side of the light-emitting element relative to the path (St), and the light-guiding member including a direct emission portion that is disposed between the irradiated object and the light-emitting element, and through which light emitted from the light-emitting element to the irradiated object is transmitted, and an indirect emission portion that is disposed between the reflective member and the light-emitting element, and through which light emitted from the light-emitting element to the irradiated object via the reflective member is transmitted, characterized in that at least one of the direct emission portion and the indirect emission portion connected to each other so as to form a single unit is directly fixedly supported by the substrate, and a light incident face of the direct emission portion and a light incident face of the indirect emission portion face to the light-emitting element, the light-emitting element is disposed on a side of an interior angle formed by the light incidence faces, and the direct emission portion and the indirect emission portion have a condensing property. a light-emitting element; a substrate on which the light-emitting element is mounted; a reflective member; and a light-guiding member that guides light emitted from the light-emitting element toward an irradiated object and the reflective member, the illuminating device illuminating the irradiated object with light that has been emitted from the light-emitting element and guided to the irradiated object by the light-guiding member and with light that has been emitted from the light-emitting element, guided by the light-guiding member and reflected to the irradiated object by the reflective member, the light-emitting element and the reflective member being disposed to sandwich a path (St) through which light reflected by the irradiated object passes, and the light-guiding member being disposed on a side of the light-emitting element relative to the path (St), and the light-guiding member including a direct emission portion that is disposed between the irradiated object and the light-emitting element, and through which light emitted from the light-emitting element to the irradiated object is transmitted, and an indirect emission portion that is disposed between the reflective member and the light-emitting element, and through which light emitted from the light-emitting element to the irradiated object via the reflective member is transmitted, characterized in that at least one of the direct emission portion and the indirect emission portion connected to each other so as to form a single unit is directly fixedly supported by the substrate, and a light incident face of the direct emission portion and a light incident face of the indirect emission portion face to the light-emitting element, the light-emitting element is disposed on a side of an interior angle formed by the light incidence faces, and the direct emission portion and the indirect emission portion have a condensing property.