NOVELTY - The thermoelectric module comprises a thermoelectric element (2), a first electrode (3), a second electrode (4), and first and second (8) insulation layers. The thermoelectric element is configured for converting energy between thermal energy and electrical energy, and comprises a first surface and a second surface opposite to the first surface. The first electrode comprises a first region, which is arranged directly on the first surface. The second electrode comprises a second region, which is arranged directly on the second surface.    USE - The thermoelectric module is useful as a thermoelectric generator, and in a heating element and an exhaust system/cooling system of a heat engine comprising such as an internal-combustion engine in a vehicle (all claimed) such as a passenger car or a heavy goods vehicle.    ADVANTAGE - The thermoelectric module can be simply, efficiently and economically produced with long service-life, and can be reliably operated with high temperature differences and without any occurrence of damage thus reducing fuel consumption and emission of combustion gases from the vehicle.    DETAILED DESCRIPTION - The thermoelectric module comprises a thermoelectric element (2), a first electrode (3), a second electrode (4), and first and second (8) insulation layers. The thermoelectric element is configured for converting energy between thermal energy and electrical energy, and comprises a first surface and a second surface opposite to the first surface. The first electrode comprises a first region, which is arranged directly on the first surface. The second electrode comprises a second region, which is arranged directly on the second surface. The first region and/or the second region comprises a metal alloy, which exhibits an Invar effect. The first insulation layer is configured for electrically insulating the first electrode from a heat source, and is disposed directly on the first electrode in part. The second insulation layer is configured for electrically insulating the second electrode from a heat sink, and is disposed directly on the second electrode in part. The metal alloy is a component of an alloy system, and has a thermal expansion coefficient ( alpha (E1)) which is located between a thermal expansion coefficient ( alpha (TE)) of the thermoelectric element and a thermal expansion coefficient ( alpha (Iso)) of the first and/or second insulation layer, where alpha (max) is greater than or equal to alpha (E1) greater than or equal to alpha (min), alpha (min) is minimum from alpha (Iso) and alpha (TE) and alpha (max) is maximum from alpha (Iso) and alpha (TE). The thermal co-efficient of alpha (E1) is 5-12x 10-6 1/K. The first layer has a thermal expansion coefficient ( alpha (E1)1), and the second layer comprises a second material having a thermal expansion coefficient ( alpha (E1)2), where alpha (max) greater than or equal to alpha (E1)1 greater than or equal to ( alpha (E1)2). The first layer and the second layer are welded/soldered to each other. The first electrode and the second electrode comprising layers (1 to n), where n is greater than or equal to 3, where a first layer comprising a first material has a thermal expansion coefficient of alpha (E1)1 and nth layer comprising an nth material has a thermal expansion coefficient of alpha (E1)n, where a series is expressed in a given specification. The first layer comprises metal alloy and a chemical composition changing over the layer thickness from a first composition to a second composition different from the first composition. The metal alloy has a Curie temperature (Tc) of greater than 400 degrees C and a fracture toughness of ~ 50 MPa m( one half ). An INDEPENDENT CLAIM is included for a method for producing a thermoelectric module.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a thermoelectric module.    Thermoelectric element (1)    First electrode (3)    Second electrode (4)    Heat sink (6)    Second insulation layer. (8)