Due to the lack of design standard and the difficulty of analysis, the vibration analysis of lightweight floors has received less attention than typical structural analysis. In this paper, the finite element model for lightweight floors is presented based on rigid link and realistic support restraints. The rigid rink is used to solve the problem of difference in the centroid of beam, joist, and flooring material and to guarantee the same behavior of those members. Two different support restrains, all fixed restraint and mixture of fixed and released restraint, are used in the analysis. The finite element model is verified through the impact loading test of the real scale floors that have different joist condition and middle beam. The finite element analysis results indicate that the different joists having same moment of inertia yield similar natural frequencies, while the test results of real scale floors shows that the closed shaped joist floor yields higher natural frequency than the open shaped joist floor. The test results also indicate that the finite element analysis using the mixture of fixed and released support restraint yields closer natural frequencies to those of actual floors.