This work presents current results regarding environmental friendly and cost effective thermoelectric generators (TEG) produced by different printing techniques. Thermoelectric devices convert wasted heat into electricity. It is shown that a polymer-based printed thermoelectric generator provides a cost effective alternative to standard thermoelectric devices. TEG were printed by different printing techniques and realized with commercially available Poly(3,4-ethylenedioxythiophene) Poly(styrenesulfonate) (PEDOT:PSS) in combination with silver (Ag) legs on flexible foils (Polyethylene terephthalate (PET), Polyimide (PI)). For a thermoelectric generator of three thermal legs an open circuit voltage of 1 mV can be achieved with a temperature difference of 30 K. The output voltage can be multiplied by a serial connection of thermocouples or higher temperature differences. Moreover the power factor PF and the Seebeck coefficient α , which are suitable parameters for the evaluation of efficiency of thermoelectric material, are determined and will be presented.