NOVELTY - A thermoelectric power generator (10) comprises p-type thermoelectric element (14), n-type thermoelectric element (20) positioned adjacent the p-type thermoelectric element defining a gap (22) in between, and 1st conductive portion (12) and 2nd conductive portion (16) electrically connecting opposed top and bottom ends of p- and n-type thermoelectric elements, respectively, wherein 1st conductive portion forms hot junction with top ends of p- and n-type thermoelectric elements and 2nd conductive portion forms cold junction with bottom ends of p- and n-type thermoelectric elements.    USE - A thermoelectric power generator (claimed).    ADVANTAGE - Energy conversion efficiency is enhanced.    DETAILED DESCRIPTION - A thermoelectric power generator (10) comprises p-type thermoelectric element (14), n-type thermoelectric element (20) positioned adjacent the p-type thermoelectric element defining a gap (22) in between, 1st conductive portion (12) and 2nd conductive portion (16) electrically connecting opposed top and bottom ends of p- and n-type thermoelectric elements, respectively, wherein 1st conductive portion forms hot junction with top ends of p- and n-type thermoelectric elements and 2nd conductive portion forms cold junction with bottom ends of p- and n-type thermoelectric elements, and external load connected in parallel with 2nd conductive portion, wherein p- and n-type thermoelectric elements have an optimal slenderness ratio X=1/(rkrke)1/2, where rk is ratio of thermal conductivities of p-type to n-type thermoelectric elements and rke is ratio of electrical conductivities of p-type to n-type thermoelectric elements, with rk and rke being selected such that X=0.3-1 for each of the p-type and n-type thermoelectric elements.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of an energy conversion efficient thermoelectric power generator.    Thermoelectric power generator (10)    1st conductive portion (12)    P-type thermoelectric element (14)    2nd conductive portion (16)    N-type thermoelectric element (20)