Preserver

Preserver can refer to:


 * Life preserver, a personal flotation device or lifebuoy
 * Life preserver, a type of club (weapon)
 * HMCS Preserver, a Canadian navy ship
 * HMCS Preserver (AOR 510), Protecteur-class supply ship
 * HMCS Preserver (1941), leadship of the Fairmile-support depot ships
 * USS Preserver (ARS-8), a U.S. navy ship
 * Preserver (Elfquest), a race in the fantasy comic Elfquest
 * Preservers (Star Trek), a Star Trek species
 * Preserver (Star Trek), a novel by William Shatner