In this research, a computational simulation model of a bunker shot for assessing sand wedge shapes is constructed using the particle element method, PEM. The PEM is one particle simulation method which simulates particle phenomenon by tracing the motion of all particles and calculating the interaction among them. The simulation model is composed of a club head, a golf ball and a large number of particles of sand. Firstly, the reproducibility of the simulation model was verified by comparison with actual bunker shots which were observed using a high speed video camera, then the simulation results gave good agreement with the observational results. Secondly, the simulation model was applied for assessing the property of a new special sand wedge which had a hollow processed on the sole, then the feature of the wedge and its cause were revealed. This simulation model provides numerical understanding of the property of sand wedges and reasons why the effective property occurs.
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