To provide a hybrid power generation element that is compact in size and improved in the use efficiency of power generation energy by simultaneously utilizing a plurality of the power generation energy, in a space where a portable apparatus and a ubiquitous sensor are placed, and to provide a power supply device using the hybrid power generation element and an installation method of the hybrid power generation element.

In the hybrid power generation element, a plurality of thermoelectric couples composed by joining different kinds of metal wires are alternately aligned in series, and formed into a state of a coil; a thermo-electromotive force and an induction electromotive force can simultaneously be generated; the metal wire 1 and the metal wire 2 different from the metal wires 1 in kind are alternately aligned in series, and formed into a state of a coil; joining parts between the metal wire 1 and the metal wire 2 are set in states of being alternately different in temperature; the coil is set so as to intersect with magnetic flux; and the thermo-electromotive force and the induction electromotive force are simultaneously generated.

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