Ar-Rahman (Arabic: الرحمان, ar-raḥmān; meaning: The Merciful) is the 55th Chapter (Surah) of the Qur'an, with 78 verses (āyāt).
The title of the surah, Ar-Rahman, appears in verse 1 and means "The Most Beneficent". The divine appellation "ar-Rahman" also appears in the opening formula which precedes every surah except Sura 9 ("In the Name of God, the Lord of Mercy, the Giver of Mercy").