This book constitutes the refereed proceedings of the First International Conference on Graph Transformations, ICGT 2002, held in Barcelona, Spain in October 2002. The 26 revised full papers presented were carefully reviewed and selected by the program committe. Also included are abstracts of 3 invited papers, a tutorial, the extended abstract of a tutorial, and 5 reports of workshops held in conjunction with ICGT. The papers deal with various graphical structures that are useful to describe complex systems and computational structures, like graphs, diagrams, visual sentences, and others. Graph transformations are stongly related to graph theory, graph algorithms, formal language and parsing theory, the theory of concurrent and distributed systems, formal specification and verification, and logic and semantics.