An illumination lamp in which a lamp fitting is attached to a support is installed outdoors. Light-emitting portions of the lamp fitting are easily attached, with a small number of components, to such a position as to illuminate a wide area. In order to prevent the attached components from being damaged, the lamp fitting (1) includes the light-emitting portions (2), a casing (10) to which the light-emitting portions are attached and a protective cover (3) which is arranged on the front side of the light-emitting portions and which protects the light-emitting portions. The casing (10) is shaped to have a plurality of attachment surfaces (11A) and (11B) to which the light-emitting portions can be attached to face in a plurality of predetermined directions. In the illumination lamp (ST), the light-emitting portions are easily attached to a predetermined position with a small number of components.