The concept of this research toward sustainability development, it focuses on avaibality of human settlement. One of the primary goals in human settlement in a city development. Most of settlement in Indonesia is located close to the river. The main function of river is living orientation, transportation, and settlement. The riverside area is developed to be a city with the rapid urban settlement along a riverside area, such as informal settlement inside formal settlement. The objective of this research is to analyse of the pattern of physical integration between formal and informal settlements in Kahayan Urban Riverside settlement. The research located in Kahayan urban riverside area, it called Kampung Pahandut, Central Kalimantan Province, Indonesia. Research method used a mix-used method based on has three phase: prilimanary, field observation, post field observation with 100 samples. The output of research is decriptive model of physical integration of settlement, it can be support settlements in those urban riverside area towards sustainable development.