A method for producing a Peltier element of a heat exchanger for temperature control of a fluid flowable through a flow chamber may include providing an electrically conductive belt. The method may also include providing the belt with a plurality of p-doped P-semiconductors and a plurality of n-doped N-semiconductors so as to alternate with one another along the belt. The plurality of p-doped P-semiconductors and the plurality of n-doped N-semiconductors respectively may have a side facing away from the flow chamber electrically contacted by a contacting structure that may include a plurality of contact elements. The method may also include separating the belt to produce a plurality of connecting elements of a connecting structure electrically contacting a side of the plurality of p-doped P-semiconductors and the plurality of n-doped N-semiconductors facing towards the flow chamber, respectively.