THERMOELECTRIC GENERATOR

[Object] Provided is a thermoelectric power generating device that is able to decrease thermal distortion of thermoelectric conversion modules and to upsize the thermoelectric conversion modules, thereby making it possible to simplify a manufacturing operation and to decrease a manufacturing cost. A thermoelectric power generating device (17) is configured to include: a body case (20) accommodating therein thermoelectric conversion modules (27); an exhaust-pipe portion (19) provided in the body case (20) so as to be opposed to heat-receiving substrates (31) of the thermoelectric conversion modules (27); a steam tank (37) attached to an outer side of the body case (20) so as to be opposed to heat-dissipation substrates (32) of the thermoelectric conversion modules (27); a steam tank (40) provided above the body case (20); thermoelectric conversion modules (41) provided above the steam tank (40) so that heat-dissipation substrates (43) thereof are opposed to the steam tank (40); and a cooling water tank (51) provided above the thermoelectric conversion modules (41) so as to be opposed to heat-receiving substrates (42) of the thermoelectric conversion modules (41).