An 
optical fiber decoration device has various merits: small 
power consumption, no danger of fire, simple water-proof design and economical, battery can be used, excellent portability, long service life of 
light source, and no danger of destruction during transportation. The 
optical fiber decoration device is characterized by having an LED 
light source consisting of a plurality of LED's which are arranged at an end of 
optical fiber for emitting one or more colors and partially superimposed, enabling synthesis of colors. In FIG. 1, the optical 
fiber decoration device (I) includes an LED 
light source unit (2) and an optical 
fiber (1a). The distance L between the LED light source (2) and the optical 
fiber is 5 to 100 mm. Red, blue, and 
green LED's are used to realize multiple colors. The optical fiber decoration device can be used for signboards, outdoor decorations, 
bus advertisement, indoor decorations, decorations in an aquarium, 
unit type Christmas trees, clothes, and the like.