  The LHCf experiment is dedicated to the measurement of very forward particle
production in the high energy hadron-hadron collisions at LHC, with the aim of
improving the cosmic-ray air shower developments models. The detector has taken
data in p-p collisions at $\sqrt s$ = 900 GeV, 2.76 TeV and 7 TeV, and in p/Pb
collisions at $\sqrt s$ = 5 TeV. The results of forward production spectra of
photons, neutral pions and neutrons, compared with the models most widely used
in the High Energy Cosmic Ray physics, are presented in this paper.
