In late years, a design system of structures has been greatly changed from a conventional specification rule to a performance rule, and a limit state design method has been totally adopted in safety checking of structures. On the other hand, distribution environment in ports has changed greatly, and construction conditions of berths including mooring facilities have also changed into deepwater and offshore positions according to jumboization of ships. In addition, there is theinternational trend where a fender design method with Temperature Factors and Velocity Factors is going to be introduced into safety evaluation of fenders.
　Therefore, considering the change of design conditions of mooring facilities and the trend of the fender design method, we examined a safety evaluation method of fenders and mooring posts by using reliability analysis. At first, we proposed concept of performance checking by the limit state design method on the fender design method with Temperature Factors and Velocity Factors, and since the proposed design method is more complicated than a conventional design method, wecreated the database system that can choose fenders simply and easily. In addition, considering the design conditions such as construction of deepwater offshore berths and advent of larger ships, we grasped the probabilistic variation characteristics of berthing forces and mooring forces of large-scale ships by using Monte Carlo simulation of berthing forces and numerical simulation of moored ships. Finally, based on the probabilistic evaluation results of berthing forces and mooringforces, we evaluated safety of fenders and mooring posts by reliability analysis and calculated safety factors in the limit state design method.