A power generation device according to an embodiment of the present invention comprises: a fluid flow part in which a fluid passes through a flow path pipe formed therein and which includes a first surface, a second surface opposite to the first surface, a third surface between the first surface and the second surface, a fourth surface opposite to the third surface, a fifth surface between the first surface, the second surface, the third surface, and the fourth surface, and a sixth surface opposite to the fifth surface; and a first thermoelectric module disposed on the first surface, wherein a fluid inlet and a fluid outlet arranged apart from each other are formed in the third surface, the flow path pipe is formed so as to be connected from the fluid inlet to the flow outlet, the flow path pipe includes a plurality of first flow path parts arranged along a first direction, a plurality of second flow path parts arranged along a second direction perpendicular to the first direction, and a plurality of bending parts that connect the plurality of first flow path parts and the plurality of second flow path parts, the fluid flow part is arbitrarily set to a first zone, a second zone, and a third zone, in this sequence, from the third surface to the fourth surface, and the plurality of first flow path parts are arranged so that the fluid sequentially passes through the first zone, the third zone, the second zone, the first zone, and the third zone.