To provide a structure of an optical fiber bundling part capable of maintaining constant brightness of intensity of conduction light of optical fiber distributed to an upper decoration part and a lower decoration part, and yet, capable of being stored separately into an upper part and a lower part, in preserving a decorative body in a storing body such as a box after using the decorative body.

In the structure of the optical fiber bundling part installed in a decorative body having an upper decoration part 6 and a lower decoration part 7 connected in free separation, an optical fiber bundling part 3 decorating an upper part and an optical fiber bundling part 4 decorating a lower part are insertion-coupled together with a receptacle 1 of a decoration-use LED light source device A incorporating an LED light source and a rotatable color filter. Further, the receptacle 1 is so structured to cover a protruding part of a built-in color filter stuck from the receptacle 1 in a radial direction.