This paper explores the relationship between action learning and Organisation Development (OD). It proposes that they are overlapping fields of practice, with interesting similarities and differences. Both fields of practice are experienced as challenging to conventional ways of viewing organisations and people but are also subject to increasing challenge themselves and both aspects are examined. Two accounts of practice are included, which cast light on action learning and OD and some preconditions for a more fruitful future relationship between the two fields are proposed.