Solid oxide fuel cells (SOFCs) are attracting attention due to their high energy conversion efficiency and fuel flexibility. For commercialization of SOFCs, multi-layer stack have to be developed for high power generation. However, stack have to satisfy several requirements such as current collection, gas distribution, sealing, etc. Among the requirements, sealing is one of the important requirements. For successful stack operation, high sealing rate inside stacks to prevent mixing of hydrogen and oxygen is necessary. If cross leakage occurs at sealing gasket, there can be low electrical efficiency, high performance degradation, and even failure of cells and stack. For sealing of stacks, compressive sealing gaskets such as mica and Thermiculite have been widely used. Compressive sealing gasket is composed of thin platelets, and hence requires certain level of normal stress for high sealing rate. Therefore, the design of solid oxide fuel cell stacks is important to apply uniform normal stress on the gasket. In this study, the normal stress applied on the compressive sealing gasket at stacks is calculated by using the finite element method (FEM).