Roll bar or rollbar may refer to:

  • Roll bar, also known as anti-roll bar or sway bar, a torsion spring bar that reduces vehicle roll
  • Roll cage, a vehicle frame designed to protect occupants in the event of a crash
  • Rollover protection structure, or rollover bar, similar in purpose to a roll cage, and fitted to open-topped cars or agricultural machinery
  • Rollbar (G.I. Joe), a fictional character in the G.I. Joe universe
  • Roll bars, bars that appear on a television screen when it is filmed, see Sync box (filmmaking)