Using complex event rules for capturing dependencies between business processes is an emerging trend in enter- prise information systems. In previous work we have iden- tified a set of requirements for event extensions for busi- ness process modeling languages. This paper introduces a graphical language for modeling composite events in busi- ness processes, namely BEMN, that fulfills all these require- ments. These include event conjunction, disjunction and in- hibition as well as cardinality of events whose graphical expression can be factored into flow-oriented process mod- eling and event rule modeling. Formal semantics for the language are provided.