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Formulation of an 8 nodes assumed strain shell element is presented for the analysis ofshells. The stiffness matrix based on the Mindlin-Reisner theory is analytically integrated through thethickness. The element is free of membrane and shear locking behavior by using the assumed strainmethod such that the element performs very well in modeling of thin shell structures. The material isassumed to be isotropic and laminated composite. The element has six degrees of freedom per node andcan model the stiffened plates and shells. A great number of numerical testing carried out for thevalidation of present 8 node shell element are in good agreement with references.