The purpose of this paper is studying some properties of clean, semi-clean and quasi-clean rings, and study the relationship between these rings. A ring is called clean if each of its element is the sum of an idempotent and a unit, a ring is called semi-clean if each of its element is the sum of an idempotent and a regular, a ring is called quasi-clean if each of its element is the sum of an idempotent and an pi .