The school introduces the experimental and theoretical particle physics background underlying several aspects of cosmology: matter anti-matter asymmetry, dark matter, the acceleration of the expansion, the 3K Cosmological Background Radiation, the geometry of the universe. The theoretical lectures offer reviews by experts on topics which include the limits of the standard model, a description of the neutrino mass, supersymmetry, leptogenesis/baryogenesis, scalar fields, and extra-dimensions. The status experimental observations in particle physics and astrophysics (CP violation, neutrino oscillations, dark matter, 3K radiation) is also covered.