A thermoelectric conversion module comprising: a pair of opposing wiring substrates (2A, 2B); and thermoelectric conversion elements (3, 4) connected between the wiring substrates by the wiring substrates, and further comprising a ceramic substrate and an electrode part (11, 12) which are provided at the respective wiring substrates, wherein the electrode part is formed on a surface of the ceramic substrate and connected to the thermoelectric conversion elements; a first thermoelectric conversion element with a larger thermal expansion coefficient and a second thermoelectric conversion element with a smaller thermal expansion coefficient, which compose the respective thermoelectric conversion elements; and an electrically conductive spacer interposed between at least one of ends of the first thermoelectric conversion elements and the ceramic substrate of the respective wiring substrates, wherein a length of the first thermoelectric conversion element along a facing direction of the wiring substrates is smaller than a length of the second thermoelectric conversion element along the facing direction of the wiring substrates, characterised in that the electrically conductive spacer is made of either one of: a bound body of resin powder coated with metal; a bound body of inorganic powder coated with metal; conductive resin; graphite; porous metal; a structure body of carbon nanofiber; graphene; and a foil or a plate made of aluminum of purity higher than 99.99 mass%, wherein the inorganic powder is either one of SiO 2 powder, ceramic powder, hollow silica powder, hollow ceramic powder and hollow glass powder. a pair of opposing wiring substrates (2A, 2B); and thermoelectric conversion elements (3, 4) connected between the wiring substrates by the wiring substrates, and further comprising a ceramic substrate and an electrode part (11, 12) which are provided at the respective wiring substrates, wherein the electrode part is formed on a surface of the ceramic substrate and connected to the thermoelectric conversion elements; a first thermoelectric conversion element with a larger thermal expansion coefficient and a second thermoelectric conversion element with a smaller thermal expansion coefficient, which compose the respective thermoelectric conversion elements; and an electrically conductive spacer interposed between at least one of ends of the first thermoelectric conversion elements and the ceramic substrate of the respective wiring substrates, wherein a length of the first thermoelectric conversion element along a facing direction of the wiring substrates is smaller than a length of the second thermoelectric conversion element along the facing direction of the wiring substrates, characterised in that the electrically conductive spacer is made of either one of: a bound body of resin powder coated with metal; a bound body of inorganic powder coated with metal; conductive resin; graphite; porous metal; a structure body of carbon nanofiber; graphene; and a foil or a plate made of aluminum of purity higher than 99.99 mass%, wherein the inorganic powder is either one of SiO 2 powder, ceramic powder, hollow silica powder, hollow ceramic powder and hollow glass powder.