Free vibration analysis of Kagome lattice cylindrical shells is presented using an improved equivalent stiffness matrix model. The boundary conditions of the shell are simply supported and the classical thin shell theory is considered to obtain the equations of motion. The modified equivalent stiffness matrix of the lattice shell is extracted by collecting stiffness matrix of a simple shell and those of grid-reinforced shell according to their volume fractions. The equations of motion are derived using the Hamilton’s principle as well as the Flugge thin shell theory and then are solved by the Navier type solution. The present results are compared by those obtained by a finite element analysis (FEA) in Abaqus software. Comparison results report good accuracy of the present method in comparison with those obtained by the FEA. Finally, effects of various parameters such as shell thickness, width and length of the grids and mode number on the natural frequencies of Kagome lattice cylindrical shell are investigated. The novelty of this paper is using the Flugge shell theory as well as a modified equivalent stiffness matrix for vibration analysis of Kagome lattice shell.