Antimatter is composed of antiparticles in the same way normal matter is composed of particles.
Antimatter may also refer to:
- Antimatter (band), the Ambient/Trip hop/Gothic rock band
- Antimatter (album), a Cubanate album
- "Antimatter", a section of the defunct science magazine Omni
- Antimatter (Star Trek novel), a Star Trek: Deep Space Nine novel written by John Vornholt