To advance into a new field of an animal-powered electric power generation plant for livestock power, human power, etc. by solving a problem that although an electric power generation energy creating technology having emphasis on environment pollution is widely extended to various fields, barriers such as quantitative haphazardness and inefficiency block the advance.

The electric power generation plant has a plant platform 6 on which a generator 4 and a battery 5 are mounted, and the plant platform is towed and turned by animal power (including human, mainly livestock power) about a center shaft 2 on a central fixed base 1 to one direction in a horizontal state with the support by a wheel 3. The animal (livestock)-powered electric power generation plant operates the generator 4 for speed-increase through a V-belt 9 connecting the central fixed base 1 and a speed-increasing mechanism 8, generates electric power and charges the battery 5 with the electric power. Also a free path electric power generation system which transmits a turning force of a single plant bicycle shaft generates electric power and charges a battery may be considered identical as a mobile plant.