This book provides a brief knowledge about synthesis and medicinal importance of benzimidazolyl chalcones and derivatives. Chapter one of this book incorporates introduction and importance of benzimidazolyl chalcone and it's derivatives. Chapter two includes synthesis of thiocarbamides using microwave induced and conventional methods. Synthesis of Microwave induced synthesis and characterization of some N1- thiocarbamido -3- benzimidazolyl -5- aryl -2- pyrazolines and characterization of synthesized compounds is given in chapter three. Chapter four deal with biological activities of benzimidazolyl derivatives. Chapter five includes study of antibacterial and antifungal activities of Microwave induced synthesis and characterization of some N1- thiocarbamido -3- benzimidazolyl -5- aryl -2- pyrazolines.