The aims of this paper are to analyse the unmet need situation in Indonesia, identify determining factors and the intervention policy strategy in several countries. This paper was a literature study, taken from the data of the 2012 Indonesian Demographic and Health Survey (IDHS) and various other sources. It is seen that unmet need level in Indonesia decreases from time to time. During the 1991 to 2012 IDHS, total unmet need decreased from 17% to 11% (4.5% for spacing and 6.9% for limiting). However, the number is considered still quiet high so an effort to solve it is needed. Determinants of unmet need can be associated with various factors such as demographical characteristic and social economic, education, culture, geographical access and condition in the area. Recommended to the government in order to develop policy strategy focused on intervention of unmet need determinants, improve financial resource allocation for access improvement of contraception service and develop capacity, improve service quality including staff training, and also public education in big scale to decrease social barriers.