Relatively little attention is given to the issue of encopresis in the professional literature but it is of great concern to parents of and practitioners working with children on the autistic spectrum. Toilet training in itself can be a difficult area for some children on the spectrum, but a perplexing complication to the whole issue arises when children refuse to defecate into a potty or toilet. No data for children on the spectrum were found in the literature search, and indeed very little research related to this topic. Thus, this article aims to: outline the problems faced by parents/carers with a child with encopresis; differentiate between knowledge, skill and volition issues when dealing with the encoprectic child; suggest some possible causal frameworks for the behaviour; and give practical advice in managing the teaching/learning situation arising from this distressing behaviour.