Autogenous shrinkage of concrete is caused by cement hydration. It has a significant influence on the performance of concrete structures, particularly those made of high performance concrete. Mastering this is a problem not only for crack control but also for good structural design. These proceedings of a workshop held in Hiroshima in June 1998 derive from the work of a Technical Committee of the Japan Concrete Institute. Topics include test and prediction methods, the science of autogenous shrinkage, strain and stress, and consequent design concerns.