This chapter discusses the importance of preparing for emergencies in the dental office. It outlines the roles and responsibilities of the dental assistant and receptionist during an emergency. The dental assistant's roles include notifying the dentist, retrieving the emergency kit and oxygen tank, and assisting the dentist. The receptionist's roles are to call emergency services and keep waiting patients calm. The chapter also reviews the contents and proper use of the emergency kit and oxygen tank. It stresses the importance of practicing emergency routines.