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Abstract—A Time of Flight scintillator system has been developed for the Pamela satellite-borne cosmic ray experiment. The main scientific goal of Pamela experiment is the measurement of the fluxes of antiprotons and positrons in cosmic rays over the large energy ranges of respectively 80 MeV-190 GeV and 50 MeV-270 GeV. The installation of the apparatus on board the Russian satellite Resurs DK1 has been completed at the beginning of 2006 and on the 15th of June 2006 the instrument was launched. The TOF system provides the fast trigger to the experiment, the rejection of albedo particles and the possibility to distinguish electrons from anti-protons up to about 1.5 GeV. The performances of the ToF and Trigger flight model systems, measured using cosmic rays and light ions in a test beam at GSI, are described