Tsunami may be generated by earthquake triggered movement of the sea bottom, landslides and collapses. It has caused great impacts on human life and coastal environments, including massive loss of human life, devastation of coastal ecosystems and settlements, and damage to infrastructure and facilities. In this chapter, tsunami protection works will be investigated as hard structures likes tsunami breakwaters, sea walls etc. and natural barriers including coastal forest etc. except soft approaches (education, awareness, evacuation, etc.). Although hard structures may provide highly effective protection, they may have high cost and may also cause large amount of negative environmental impact on the coastal areas. That is why, natural coastal barriers which have lower environmental impact and higher additional natural value can be considered as a protection measure against tsunami effects.