The invention provides a power generation method using a thermoelectric element, a thermoelectric element, and a thermoelectric device that excel in thermoelectric performance and are applicable to a wider range of applications over conventional counterparts. The element includes a first electrode and a second electrode that are disposed to oppose each other, and a laminate interposed between the first and second electrodes and electrically connected to both of the electrodes. The laminate has a structure in which a Bi layer and a metal layer made of a metal other than Bi are alternately layered, and the Bi layer and the metal layer having layer surfaces that are slanted with respect to a direction in which the first and second electrodes oppose each other. The element generates a potential difference between the electrodes by a temperature difference created along a direction perpendicular to the opposing direction of the first and second electrodes in the element. The power generation method and the thermoelectric device use this element.