Trap Door is a science fiction fanzine by Robert Lichtman.
Previously Robert Lichtman had published PSI-PHI in the 1950s and Frap in the early 1960s. After a period of being away from fandom he returned in the 1980s and began publishing Trap Door in 1983 in California, U.S.A.
Contributing writers have included Ron Bennett (Ploy, Skyrack), rich brown, Gregg Calkins, Calvin Demmon, Mike Dobson, Gordon Eklund, Lucy Huntzinger, Dave Langford (Ansible), Joel Nydahl (Vega), Chris Priest, Steve Stiles, and Ted White.
Included in #17 was the poem by Julia Vinograd , For Dick Ellington, Berkeley Typesetter, on the occasion of his passing.
Trap Door first won the FAAn Award for Best Fanzine in 2000, with "No.1 Fan Face" Award going to Robert Lichtman. In 2004, Trap Door again won Best Fanzine, and for a third time in 2011, when Lichtman also won the Harry Warner, Jr. Memorial Award for Best Fan Correspondent, an award he had also won in 2001, 2006, 2008, and 2010.