A new TeV source, HESS J1641-463, has been serendipitously discovered in the Galactic plane by the High Energy Stereoscopic System (H.E.S.S.) at a significance level of 8.6 standard deviations. The observations of HESS J1641-463 were performed between 2004 and 2011 and the source has a moderate flux level of 1.7 % of the Crab Nebula flux at E > 1 TeV. HESS J1641-463 has a rather hard photon index of 1.99 +/- 0.13_stat +/- 0.20_sys. The VHE gamma-ray emission of HESS J1641-463 is found to be constant over the entire observations. HESS J1641-463 is positionally coincident with the radio supernova remnant SNR G338.5+0.1, but a clear counterpart could not be identified at lower energies, in particular at X-rays. Different possible VHE production scenarios will be discussed in this contribution.