This book constitutes the refereed proceedings of the 10th International Conference on Algebraic Methodology and Software Technology, AMAST 2004, held in Stirling, Scotland, UK in July 2004. The 35 revised full papers presented together with abstracts of 5 invited talks and an invited paper were carefully reviewed and selected from 63 submissions. Among the topics covered are all current issues in formal methods related to algebraic approaches to software engineering including abstract data types, process algebras, algebraic specification, model checking, abstraction, refinement, model checking, state machines, rewriting, Kleene algebra, programming logic, etc.