Résumé
Supernova remnants (SNRs) are the prime candidates for the acceleration of
the Galactic Cosmic Rays. Tracers for interactions of Cosmic Rays with ambient
material are gamma rays at TeV energies, which can be observed with ground
based Cherenkov telescopes like H.E.S.S. In the recent years H.E.S.S. has
detected several SNRs and interactions of SNRs with molecular clouds. Here the
current results of these observations are presented and possible leptonic and
hadronic scenarios are discussed. It is shown that it is likely that SNRs are
the sources of Galactic Cosmic Rays.