  Pulsars are commonly regarded as highly magnetized neutron stars, rotating up
to several hundred times per second. Over 1,500 radio pulsars have been found
so far, about 70 of which are X-ray pulsars, but only a handful have been
observed in gamma rays. This high-energy emission is believed to be produced by
the electrons accelerated to TeV energies in the pulsar magnetosphere,
resulting in cascades of secondary particles. The H.E.S.S. experiment is a
system of four imaging atmospheric Cherenkov telescopes in Namibia, which is
sensitive to gamma rays above 100 GeV. Three young pulsars, Crab, Vela, and PSR
B1706-44 have been observed with H.E.S.S. The results of the search for pulsed
emission for these targets, and the constraints on the theories of pulsed very
high energy gamma-ray emission, are summarized here.
