The present invention relates to an unattended-cooking rice cooker device in which cooking ingredients such as rice or other grains are supplied, cleaned, and cooked and, more specifically, to an unattended-cooking rice cooker device comprising: a supply unit that divides and stores the cooking ingredients to supply the cooking ingredients; a cleaning unit that receives the cooking ingredients supplied from the supply unit and cleans the cooking ingredients supplied therein while forwardly and backwardly rotating; and a cooking unit including a rice cooker that receives and cooks the cooking ingredients cleaned in the cleaning unit, so as to automatically perform the cleaning and cooking of the ingredients. At the same time, a cleaning drum unit of the cleaning unit can be used as a lid (cap) of the cooking unit including the rice cooker, and thus the number of components can be reduced. In addition, the heat during the cooking is transferred into the cleaning unit to improve hygiene conditions in the cleaning unit.