[en] The prospects to search for scalar and vector leptoquarks at high energy e⁺e^- colliders are reviewed. We compare production cross sections in the energy range between √(s)=O(200GeV) and 1TeV for e⁺e^- annihilation. QED and QCD corrections and the effect of beamstrahlung in these processes are discussed. For the case of linear colliders the search potential in the different possible collider modes as e⁺e^- annihilation, e^±γ scattering, and γγ fusion is compared. ((orig.))