Description:This book constitutes the refereed proceedings of the 7th International Conference on Case-Based Reasoning, ICCBR 2007, held in Belfast, Northern Ireland, UK in August 2007. The 15 revised full research papers and 18 revised poster papers presented together with 3 invited talks were carefully reviewed and selected from 64 submissions. The papers address all current aspects of case-based reasoning and feature original theoretical research, applied research, and deployed applications with practical, social, environmental or economic significance.