I have tested it with JBoss 5.1.0 and the @Resource annotation works. One thing is strange: At the time, "EJB 3 in Action" was written there was no JBoss 5 available. But if "EJB 3 in Action" was created on the basis of JBoss 4.2, and this version don't understand the @Resource annotation, the authors should not write to use @Resource with the JBoss AS. I think, I should buy and read the book "JBoss in Action". It seems that one of the authors is very competent and experienced. Thank you for your help. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4253478#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...