Laboratory experiments were performed to study the wave forces acting on a model plant (Zostera Japonica Ascheras) on the bed of two dimensional wave flume. The wave forces acting on the both directions of wave propagation (in line direction) and gravity were measured by using a two components load cell installed under the bed of wave flume. In order to study the wave damping capacity of a crowd of model plants, theenergy dissipation per unit time due to a model plant were evaluated by measuring the wave forces and incident flow velocities.