The present lectures contain an introduction to supersymmetry, a new symmetry that relates bosons and fermions, in particle physics. The motivation to introduce supersymmetry is discussed. The main notions of supersymmetry are introduced. The supersymmetric extension of the Standard Model - the Minimal Supersymmetric Standard Model is considered in more detail. Phenomenological features of the MSSM as well as possible experimental signatures of SUSY are described.