Endodontic therapy consists of a series of scientifically based technical procedures. Lack of scientific knowledge, its poor application, or a compromise or a break in the chain of proper measures can lead to a number of accidents which are collectively called 'endodontic mishaps'. These accidents can occur during diagnosis, access preparation, cleaning and shaping, obturation and post-space preparation. Thus, the aim of present review of literature is to discuss endodontics procedural errors in details.