NICA is the new complex being constructed on the JINR aimed to provide collider experiments with ions up to Au at energy of 4.5x4.5 GeV/u. The NICA layout includes 600 MeV/u Booster synchrotron as a part of the heavy ion injection chain of the NICA Collider. The main goals of the Booster are the following: accumulation of 2·10 ⁹ Au ³¹⁺ ions; acceleration of the heavy ions up to energy required for effective stripping; forming of the required beam emittance with electron cooling system. The layout makes it possible to place the Booster having 210.96 m circumference and four fold symmetry lattice inside the yoke of the former Synchrophasotron. The features of the Booster, its main systems, their parameters and current status are presented in this paper.