Questions concerning the notion of quality of life, its definition, and its ap plications for purposes of assessment and measurement in social and medical contexts, have been widely discussed in Scandinavia during the last ten years. To a great extent this discussion mirrors the international develop ment in the area. Several methods for the assessment and measurement of quality of life have been borrowed from the UK and the US and then further developed in northern Europe. But there has also been an internal develop ment. This holds in particular for the social arena, where Scandinavia has had a special tradition both in theory and practice. In this volume an attempt is made to illustrate some aspects of the philo sophical, and in general theoretical, discussion concerning quality of life in Scandinavia. In addition, some prominent scholars from other parts of Europe, i. e. , France, the Netherlands, the UK and Italy, have been invited to contribute. The volume is divided into three sections. The first contains philosophical analyses of the general notion of quality of life and proposes a number of different explications. The second section considers various ap plications of the notion of quality of life in health care. The papers serve to disentangle some intellectual and ethical problems that stem from these ap plications. The third section is more practical and focuses on methods of measuring quality of life in medicine and health care.