Green open areas (GOA) are open areas where the land surfaces are not covered by designed building or housing or other constructions. Inside this open areas are grew or planted by designed plants, such as the species of grasses, herbs, shrubs and trees. The GOA in Jakarta are basically divided into two big groups, those are protected GOA and Guided GOA. In the protected GOA, they include nature reserves, protected forests and tourism forests; and in the guided GOA are urban forests, which include city parks, many kinds of greenbelts along the roads, railways, rivers, lakes etc., cemeteries or graveyards, and other GOA. In this paper the condition, function and use, problem and suggestion how to solve and manage the GOA in Jakarta are discussed.