To fix leaf-shaped solar battery panels on the edge parts of the branches and twigs of an electric tree, which is an artificial tree, and moreover, to mount movable type leaf-shaped solar battery panels provided in a solar tracking device at required places, where a large number of the leave-shaped solar battery panels are fixed, around the electric tree and to provide clean energy generated by central generation of the sunlight.

A large number of leaves of leave-shaped solar battery panels are fixed on an electric tree. The sizes of the solar battery panels 2 are also changed according to the kinds of the sizes of the various leaf shapes of the leaf-shaped solar battery panels 2 and the kinds of the sizes of the various leaf shapes of movable type leaf-shaped solar battery panels of a solar tracking device and a generation output also comes to change. Moreover, the solar battery panels are integrally constituted with the leaf-shaped surface, which are made of synthetic resin or a light metal, to be fixed.