Prisión Fatal (2017) was a professional wrestling major event, scripted and produced by the Mexico based International Wrestling Revolution Group (IWRG) professional wrestling promotion. The event took on January 1, 2017, at "Arena Naucalpan" in Naucalpan, State of Mexico, IWRG's main venue. The show was also the IWRG 21st Anniversary Show, marking the creation of IWRG on January 1, 1996. It was the seventh time IWRG held a Prisión Fatal event, all of which featured the eponymous Prisión Fatal (Spanish for "Deadly Prison") Steel cage match as the main event. In the Prisión Fatal match the last person remaining in the cage is forced to unmasked as per the match stipulation.