The efficiency and power output of a thermal device is directly proportional to its inlet temperature. Operating at elevated temperature affects the structural stability of its components under load. The gas turbine is a thermal device in which components like fixed and moving blades experience dynamic loading. Apart from elevated temperature, the design of cooling passages, materials which made up of also influential in their structural stability of the blades. In this research the guide vane (Fixed blade) with the showerhead type cooling of gas turbine is considered. The objective of the research is to investigate the influence of the materials like CMSX and RENE 77 in such applications. The design softwares like Pro –E and ANSYS R14 employed to design and FEM analysis respectively.