Abstarct: Solid Oxide Fuel Cells (SOFCs) are electrochemical devices to produce clean energy that converts chemical energy into electrical energy. Their need for high operating temperature made a challenge for commercialization of SOFCs. Reducing the thickness of the electrolyte laxyer is the most effective way for reducing the operating temperature of SOFCs. Inkjet printing that is a familiar method for printing computer data onto a paper, has become a high yield and cost effective method in the past few years to preparation of thin films. In this thesis, prepared suspensions from Yttria Stabilized Zirconia (YSZ) were used to produce thin electrolyte laxyers on the graphite substrates. In order to evaluate the printability, rheological properties of suspensions consist of density, surface tension and viscosity were measured. Printed laxyers were pre-sintered at 900 °C to burn out graphite substrate and polymeric materials. The effects of time and temperature of sintering were investigated in order to get dense and non-defective laxyers. The thicknesses of laxyers were measured by optical microscope that was showed a non-uniform thickness of laxyers by the average amount of about 60 μm after 400 times of sequential printing. Structural properties were examined by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). Also, mechanical properties were examined by Nano indentation. Experimental results revealed that inkjet printing can be as an acceptable and commercialize method to produce thin film electrolytes in SOFCs.