The Collaborative International Dictionary of English v.0.48:

Perjurer \Per"jur*er\, n.
   One who is guilty of perjury; one who perjures or forswears,
   in any sense.
   [1913 Webster] Perjurious

WordNet (r) 3.0 (2006):

perjurer
    n 1: a person who deliberately gives false testimony [syn:
         perjurer, false witness]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "perjurer":
   Ananias, Baron Munchausen, Father of Lies, Satan,
   Sir John Mandeville, consummate liar, dirty liar, equivocator,
   fabricator, fabulist, false witness, falsifier, fibber, fibster,
   habitual liar, liar, mythomaniac, palterer, pathological liar,
   prevaricator, pseudologist, pseudologue, sober, spinner of yarns,
   storyteller, yarn spinner, yarner