This research is conducted to describe the phenomenon of conversion of agricultural land policy upon food security in several provinces in Indonesia. Protecting agricultural land has become very important since the efforts of land conversion from agricultural land into non-agricultural land are increasing as the need for land for development increases. Indonesia is an agrarian ASEAN country and has experienced the rice self-sufficiency; however, unfortunately now Indonesia becomes a rice importer. Whereas, the government have published several regulations in order to give protection to agricultural land which is based on the 1945 Constitutional Law. This research will answer several problems as follows: Firstly, to explain the importance of agricultural land use to be applied in Indonesia with the examples of land conversion in Bali Province and Klaten Regency, Central Java Province. Secondly, to identify the factors which cause land conversion from agricultural land into non-agricultural land. Thirdly, to analyze the regulations that control the agricultural land protection in Indonesia. This legal research is intended to examine rules of law and principles. This research mainly uses juridical-normative approach by identifying and analyzing agricultural land use policy in Indonesia.