The present study explored the relationship between parental attributions and treatment acceptability of behavioural interventions for problem behaviour in children with autism spectrum disorders (ASD).Mothers of children with ASD aged 3 to 9 years (N = 139) completed survey measures that assessed demographics, parental attributions, treatment acceptability of parent-focused and child-focused behavioural interventions, severity of their child's disruptive behaviour, and severity of their child's ASD symptoms. The results showed that parental attributions of parent-referent stability, but not the other attributional dimensions, negatively predicted treatment acceptability of a parent-focused behavioural intervention, even when severity of disruptive behaviour was statistically controlled.Conversely, no associations were found between any attributional dimension and treatment acceptability of a child-focused behavioural intervention. Preliminary analyses also revealed that mothers' ratings of the severity of their child's disruptive behaviour were significantly negatively associated with the acceptability of both parent-focused and child-focused behavioural interventions.The findings have potential implications for professionals to identify and challenge distorted attributions of parent-referent stability to promote parental acceptance of a parent-focused behavioural intervention for problem behaviour in children with ASD.Keywords: treatment acceptability, attributions, behavioural intervention, problem behaviour, autism Do maternal attributions play a role in the acceptability of behavioural interventions for problem behaviour in children with autism spectrum disorders?