A ring is called clean if every element is the sum of an idempotent and a unit and a ring is semiclean if every element is the sum of periodic and a unit. Every clean element is semiclean. The group ring Z (7) G with G a cyclic group of order 3 is proved to be semiclean. The n matrix ring M n (R) over a semiclean ring is semiclean. If R is a torsion free semiclean ring in which every element of R can be written as a sum of periodic and 1 , then R is a sum of no more than 3 units.
