In an illumination device (100), light emitted from an emission element (130) is directed toward a second luminous flux control member by a first luminous flux control member of a luminous flux control member (140), and then toward the side and rear of the illumination device (100) from the second luminous flux control member. The light is then caused to pass through a cover (160) having a shape in which the ratio (R/O) of the distance (R) between P3-P4 in the Y direction to the distance (O) between P1-P2 in the X direction is greater than 0.33 and less than 1.2, and then the light is evenly distributed to the front, sides and rear of the illumination device (100).