An object of the present invention is to provide a light guide for a small light bulb, a small light bulb, and an electrical decoration device that can emit light with a natural and warm feeling that is gentle to the human eye, and that can promote the expansion of usage of shells. It is what. A light guide for a small light bulb according to the present invention is formed from a shell. The light guide for a small light bulb is preferably formed in a substantially spherical shape and has a recess for inserting a light bulb head. The small light bulb of the present invention includes a light bulb main body and a light guide for the small light bulb attached to the head of the light bulb main body. In the small light bulb, the side surface of the head of the light bulb body may be coated with a reflective material. The electrical decoration device of the present invention includes a plurality of small light bulbs, a plurality of sockets into which the small light bulbs are inserted, and electric wires connected to these sockets. [Selection] Figure 1
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