  When very high-energy photons (VHE, E>100 GeV) propagate over cosmological
distances, they interact with background light by pair production. Observations
of spectral features in the VHE band of extragalactic sources related to this
energy-dependent absorption process with the H.E.S.S. array of Cherenkov
telescopes allow measuring the spectral energy distribution (SED) of the
extragalactic background light (EBL), otherwise very difficult to determine.
Preliminary results on the determination of the SED of the EBL will be
presented, based on the measurements of the energy spectra of blazars with
H.E.S.S. at redshifts up to z = 0.2. This model independent approach shows that
the shape and overall normalization of the EBL SED is accessible.
