The effect of construction of seawalls on the beach profile attracts the researchers –in the field of coastal engineering- a lot. Although there is a great need for construction of seawall in many places along the shoreline, this construction causes great number of drawbacks in the coastal zone. Throughout this paper the effect of the existence of seawalls on bed change at the toe was studied using different wave steepnesses and different wall slopes incase of both a beach slope 1:10 and 1:20. The experimental results were expressed in a mathematical relations to be easily applied by engineers working in this field, the obtained mathematical relations can give an evaluation for scour or bed change at wall toe for different locations of seawall relative to shoreline.