Abstract
Importance of ODA (Official Development Assistance) evaluation is recognized for securing accotmtability and improving the quality ODA. However, concrete evaluation methods that cover each sector do not exists. Therefore, this study aims to develop the evaluation methods for water supply sector, which is most important sector of ODA. Field surveys were comprehended m Nepal, Philippines, Viet Nam, Indonesia and Sri Lanka for cmidering the evaluationmenthods. Quantitative evaluation indicatn were developed anresults ofevaluation were proposed bythe data collected in Sri Lanka.