The international Muon Ionization Cooling Experiment (MICE) is being built at the Rutherford Appleton Laboratory (RAL). It will carry out a systematic investigation of ionization cooling of a muon beam. This is one of the major technological steps needed in the development of a muon collider and a neutrino factory based on muon decays in a storage ring. MICE will use particle detectors to measure the cooling effect with high precision, achieving an absolute accuracy on the measurement of emittance of 0.1% or better. A PID system based on three Time-of-Flight stations, two Aerogel Cerenkov detectors, a KLOE-like calorimeter in combination with Electron-Muon Ranger calorimeter has been constructed in order to keep beam contamination (e, π) well below 1%. The MICE time-offlight system will measure timing with a resolution better than 70 ps per plane, in a harsh environment due to high particle rates, fringe magnetic fields and electron backgrounds from RF dark current. The aim of this paper is to give a quick overview of the particle identification system in MICE.