At present, human beings in the developed world, especially those living in the so-called highly developed countries, widely acknowledge that the development which has taken place so far has for the most part failed and is unsustainable. In April 1987, the United Nations launched the publication Our Common Future, which popularized the term ‘sustainable development’. This report suggested guidelines and measures to achieve sustainable development. However, thirty years later, concrete solutions to unsustainable development are still not clearly evident. - Chapter I Introduction - Chapter II Happiness in Buddhism and Development - Chapter III Western Concept in Happiness, in Comparison to that in Buddhism - Chapter IV Proposing Buddhist Approach to Economics - Chapter V A New Concept of “Buddhist Sustainable Development” - Chapter VI Sustainable Development Concepts - Chapter VII Concluding Remarks