Disclosed is a lighting apparatus comprising: a light source unit emitting light from the front side; a plate coupled to the back side of the light source unit and comprising a through hole which is formed on the center; and a holder disposed between the light source unit and the plate and comprising an accommodation groove which is formed on the side facing the through hole, wherein the accommodation groove has a first width in a first direction and a second width in a second direction intersecting the first direction, wherein the first width is greater than the diameter of the through hole and the second width is less than the diameter of the through hole.