This study is focused on the protection effects of geosynthetics installed on HDPE water barrier in waste landfill to resist against puncture loads. It was conducted by a model test with various types of puncture loads created by different shapes of tools. The puncture resistance of geosynthetics installed as a protective material on HDPE (High density polyethylene) water barrier is varied with the sizes of geosynthetics and types of puncture loads. Finally, it was found that the protection effect for all kinds of geosynthetics when a truncated cylindrical shape of puncture tool is used is lower than others. Also, geocomposite as is the most effective against puncture for all types of puncture loads.