General objective of this lecture is to present on Actin and Myosin; here briefly present these subjects with figure. Actin is one of the most condensed forms of protein, which is globular and is a monomeric subunit of micro filament. Actin rules over cell functions which include cell division, morphing of the shape of the cells, cell mobility and other contractile properties. Actin filaments, usually in association with myosin, are responsible for many types of cell movements.