A heating device, in particular for a vehicle air conditioning system, - with a housing, in which at least two elongated electric heating elements are arranged, - wherein the at least two heating elements are held by an upper longitudinal end in an upper seal and by a lower longitudinal end in a lower seal, - wherein the upper seal has a number of through-openings corresponding to the number of heating elements, through which respectively an electrical connection of a respective heating element is directed and in which the heating elements are respectively received in a sealed manner, characterized in that - the housing having a first frame part and a second frame part, - the two seals (6, 7) are arranged at two opposite sides between the two frame parts (2, 3), - wherein between the seals (6, 7) and the frame parts (2, 3) a lubricating and/or sealing material is arranged, - the first and the second frame part (2, 3) have a permeable grid structure between the two seals (6, 7) and delimit a permeable heating chamber, - the upper seal seals the heating chamber in a fluid-tight and gas-tight manner against a connection chamber, in which the electrical connections of the heating elements are arranged, - the upper seal in the region of the through-openings lies with a continuous, rectangular surface tightly against the first frame part and with another continuous, rectangular surface tightly against the second frame part, - on the upper seal two projecting sealing pins are arranged, which in an installed heating device are clamped between the two frame parts (2, 3) and are arranged parallel to the elongated heating elements. - with a housing, in which at least two elongated electric heating elements are arranged, - wherein the at least two heating elements are held by an upper longitudinal end in an upper seal and by a lower longitudinal end in a lower seal, - wherein the upper seal has a number of through-openings corresponding to the number of heating elements, through which respectively an electrical connection of a respective heating element is directed and in which the heating elements are respectively received in a sealed manner, characterized in that - the housing having a first frame part and a second frame part, - the two seals (6, 7) are arranged at two opposite sides between the two frame parts (2, 3), - wherein between the seals (6, 7) and the frame parts (2, 3) a lubricating and/or sealing material is arranged, - the first and the second frame part (2, 3) have a permeable grid structure between the two seals (6, 7) and delimit a permeable heating chamber, - the upper seal seals the heating chamber in a fluid-tight and gas-tight manner against a connection chamber, in which the electrical connections of the heating elements are arranged, - the upper seal in the region of the through-openings lies with a continuous, rectangular surface tightly against the first frame part and with another continuous, rectangular surface tightly against the second frame part, - on the upper seal two projecting sealing pins are arranged, which in an installed heating device are clamped between the two frame parts (2, 3) and are arranged parallel to the elongated heating elements.