In the coastal zone, there is an increasing of socioeconomic development which related to coastal erosion problem and causes some damages to the geography of the coastal zone. Besides, the environmental effects also play its role that may affect the coastal area such as shoreline changes, wave condition, relative sea level rise and climate change. In order to cope with the problem, this paper aims to illustrate the relationship of risk factors for coastal erosion decision problem using Interval Type-2 Fuzzy Decisionmaking Trial and Evaluation Laboratory (IT2FDEMATEL) method which is the evaluation of the factors is modelled by fuzzy approach. The study identified the four main risk factors and fourteen critical criteria as a factor that contributes to the coastal erosion. Determining the associated element towards the problems regards a wary action in order to demonstrate a critical point of decision problems in a real application which involve uncertainty during decision process. The preference scale provided by the decision makers is calculated using trapezoidal type-2 fuzzy number instead of crisp numbers. In this paper, the finding indicates that the shoreline changes/evolution is the most important risk factors to lead the coastal erosion problems followed by climate change, relative sea level rise and wave condition. Thus, it is hoped that the findings could be beneficial to policy makers to underline the need to be undertaken in dealing with coastal erosion.