This report contains the preliminary versions of papers presented at the International Conference on Advances in Modal Logic held in September 2004 in Manchester. The papers include 6 contributions by invited speakers and 28 accepted regular papers. These cover a wide range of topics in modal logic, extending from foundational papers on the mathematics of modal logic, proof theory, computational aspects, philosophical issues, to more `applied' research where extended modal logic formalisms and modelling of knowledge, belief, time and actions are crucial.