This book constitutes the refereed proceedings of the 5th International Symposium on Static Analysis, SAS'98, held in Pisa, Italy, in September 1998. The 20 revised full papers presented were carefully reviewed and selected from a total of 48 submissions. Also included is an invited tutorial. The papers are organized in topical sections on data-flow analysis, logic programming, concurrency, abstract domains, partial evaluation, type inference, and optimization. The invited tutorial by David Schmidt and Bernhard Steffen is entitled "data-flow analysis as model checking of abstract interpretations".