Life saver may refer to:

• A personal flotation device used in water rescue or lifeguarding.
• A lifeguard or Surf lifesaver:
  • Surf Life Saving Australia
  • Surf Life Saving New Zealand
• The Westpac Life Saver Rescue Helicopter Service
• Life Savers, a brand of confectionary
• Lifesavers Underground (LSU), The Christian rock band

Life saver may also be a mishearing of:

• Lightsaber, a fictional weapon from Star Wars.