  The \underline{KA}rlsruhe \underline{TRI}tium \underline{N}eutrino Mass
Experiment is a next generation tritium beta decay experiment designed to reach
a sensitivity of $0.2~ \mathrm{eV}/\mathrm{c}^2$. KATRIN will allow to
investigate the role of the neutrino hot dark matter in the evolution of large
scale structures of the universe and will also allow to discriminate between
so-called hierarchical and quasi-degenerated neutrino mass models. The status
of the first components of the final KATRIN setup will be shown.
