This book constitutes the refereed preceedings of the 6th European Conference on Case-Based Reasoning, ECCBR 2002, held in Aberdeen, Scotland, UK in September 2002 The 31 revised full research papers and 14 revised application papers presented togehter with 2 invited contributions were carefully reviewed and selected from numerous submissions. All current issues in case-based reasoning, ranging from foundational and methodological issues to advanced applications in various fields are addressed.