The study prioritizes rice research problems by different ecosystems and research disciplines. Combination of economic surplus and scoring approach is used in setting rice research priority among different rice ecosystems, and only scoring approach is used to prioritize rice research problems by discipline. The study uses (a) information collected from agricultural research managers, rice scientists, extension workers and economist, and (b) different published data. Results show that rainfed lowland and irrigated ecosystems are top priority ecosystems as far as rice research in Bangladesh is concerned. Among different problem areas, Plant Breeding and Genetics, and Pest Management are two most high priority problem areas. Natural resource assessment and socio - economic analysis. two neglected fields in the Bangladesh Agricultural Research System, are also important research problem areas.