Metatron (Hebrew ?????? or ???????), is the name of an angel in Judaism and some branches of Christianity and Islam. There are no references to him in the Jewish Tanakh (Old Testament), Christian Scriptures (New Testament), or the Quran. Metatron does appear in post-scriptural esoteric and occult sources. There is no consensus as to his genesis or the role that he plays in the hierarchy of Heaven and Hell.
Origins
The Talmud has a section in which it claims that Elisha ben Abuyah, also called Aher ("another", as he was an apostate), entered Paradise and saw Metatron sitting down (an action that in heaven is permissible only to God Himself). Elishah ben Abuyah therefore looked to Metatron as a deity and said heretically, "There are indeed two powers in heaven!" The rabbis explain that Metatron was allowed to sit because of his function as the Heavenly Scribe, writing down the deeds of Israel (Babylonian Talmud, Hagiga 15a)."... the Talmud states, it was proved to Elisha that Metatron
Source:
http://en.wikipedia.org/wiki/Metatron