Hi there, I solve it this way. I hope it could be useful. Best regards, Mário Rodrigues @Entity @IdClass(RegistoPontoRondaPK.class) public class RegistoPontoRonda { ........ fileds declaration @Id public Date getData() { return data; } @Id public long getTurno_id() { return turno_id; } @Id public long getPonto_id() { return ponto_id; } ........ getters and setters } @Embeddable class RegistoPontoRondaPK implements Serializable { private Date data; private long turno_id; private long ponto_id; ........ getters and setters } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3984690#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...