There will be one instance, but make sure you add an @Synchronized annotation, since SFSBs do not support concurrent calls. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3980836#3980836 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3980836