To improve decorative effect in a decoration apparatus rotating a reflector by providing the reflector with at least a reflection surface comprising a non-concentric circular arc curved surface to the center axis of a rotary member or a plane set in the direction crossing the center axis of the rotation to vary a pattern of figures, color or the like.

An opening part 11 is provided on the front while a rotary member 2 is provided at the center of a surface 14 deep in a box body 1 depicting a reflection display object 13, for example, by applying color or the like on an inner circumferential surface 12 thereof. A motor on the rotary member 2 is driven to rotate a rotating shaft 23 through a gear train so that a reflector 3 mounted on the free end side of the rotating shaft 23 is rotated. The external surface of the reflector 3 is provided with a reflection surface 31 formed on a plane rotating centered on the rotating shaft 23 is rotated. When the reflector 3 turns, a display range of the reflection display object 13 to be projected onto the reflection surface 31 is moved so that the reflection display object 13 is displayed to move faster than the reflector 3.