Axis of time or time axis, may refer to:
- a representation of time as a parameter in classical mechanics, see Absolute time and space
- any representation of the events in chronological order, see Timeline
- Axis of Time (novel series), title of an alternative history trilogy (2004–2007) by John Birmingham
- The Time Axis (novel), a 1949 novel by Henry Kuttner serially published later collected as a single volume by Ace in 1965
- Time Axis, a fictional device from the 2010 videogame Doctor Who: Return to Earth