NOVELTY - A thermoelectric conversion element for thermoelectric conversion module comprises pn junction of n-type thermo-element (1) and p-type thermo-element (2). The n-type thermo-element consists of lithium, sodium, potassium, cesium, calcium, barium, yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, and/or thulium with respect to 1 mole graphite powder. Donor substance of n-type is greater than or equal to 0.01 mole ytterbium or lutetium. Graphite intercalation compound of the n-type is obtained by adding less than or equal to 0.17 mole n-type intercalation compound.    USE - A thermoelectric conversion element for thermoelectric conversion module (claimed) used for electric power generation.    ADVANTAGE - Thermoelectric conversion element is not sensitive to heat treatment, non-toxic, and lightweight and has excellent and stable performance over a long period of time, molding is easy, material cost is low, and operating temperature below room temperature to softening point of glass or allowable temperature limit of inorganic-type adhesive agent can be used.    DETAILED DESCRIPTION - A thermoelectric conversion element for thermoelectric conversion module comprises pn junction of n-type thermo-element (1) and p-type thermo-element (2). The n-type thermo-element consists of lithium, sodium, potassium, cesium, calcium, barium, yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, and/or thulium with respect to 1 mole graphite powder. Donor substance of n-type is greater than or equal to 0.01 mole ytterbium or lutetium. Graphite intercalation compound of the n-type is obtained by adding less than or equal to 0.17 mole n-type intercalation compound, mixing and dispersing in ratio of 15-80 vol.% in matrix of glass powder or inorganic-type adhesive agent, hardening, heating, and forming at melting point of glass or solidification temperature of inorganic-type adhesive agent. The p-type thermo-element consists of copper, iron, cobalt, nickel, magnesium, zinc, manganese, palladium, platinum, mercury, cadmium, zirconium, hafnium, antimony, bismuth, niobium, tantalum, molybdenum, uranium, boron, aluminum, gallium, indium, thallium, chromium, ruthenium, osmium, gold, yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium holmium, erbium, thulium, ytterbium, lutetium, tellurium, or tungsten chloride with respect to 1 mole graphite powder. Donor substance of p-type is greater than or equal to 0.01 mole iron fluoride, mercury, cadmium, aluminum, thallium, gold, gallium bromide, boron bromide, phosphorus, arsenic, antimony, niobium, tantalum, iodine, molybdenum, or tungsten. Graphite intercalation compound of p-type is obtained by adding less than or equal to 0.17 mole p-type intercalation compound, mixing and dispersing in ratio of 15-80 vol.% in the matrix of glass powder or inorganic-type adhesive agent, hardening, heating, and forming at melting point of glass or solidification temperature of inorganic-type adhesive agent. INDEPENDENT CLAIMS are included for:    (1) thermoelectric conversion module;    (2) manufacture of thermoelectric conversion element; and    (3) manufacture of thermoelectric conversion module.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of a thermoelectric conversion element.    N-type thermo-element (1)    P-type thermo-element (2)    Negative electrode board (3)    Positive electrode board (4)    Metal plate (5)