The properties of neutrino, detection of neutrino, helicity and experimentalrndetermination of helicity are discussed here. Main points on which this projectrnwork give focuses are the interaction of neutrino with matter, neutrino reactionrncross section, mean free path of neutrino, neutrino helicity and experimentalrnmeasurement of helicity. Experimental detection of neutrino will be descussed onrnthe basis of cowan and F. Rein's experiment