The invention is intended to give an active atmosphere by providing the luminaire used in an office with a brightness effect, without giving glare directly to office workers, giving dark feeling on the ceiling, giving oppression feeling, or blocking the viewing field, and by giving a desired illuminance on the working surface, and giving a high brightness sensation in the overall room, by possessing one or more sparkling regions of which luminance L is in a range of 3.3 ≦ log L ≦ -0.3 log w + 2.63 when seen from any position in the room in a range of perpendicular angle of 60 degrees to less than 90 degrees, with the direction immediately beneath the center of the luminaire as 0 degree, supposing the luminance of the bright region of the luminous element of the luminaire to be L [unit: cd/m²] and the apparent size of the sparkling region to be solid angle w [unit: steradian (sr)].