Obsessive-compulsive symptoms (OCS) have been observed in a substantial proportion of patients with schizophrenia. Although several studies have investigated the comorbidity associated with OCS in schizophrenia, few case studies are available regarding cognitive behavioural therapy (CBT) for the treatment of OCS of patients within this group. This paper describes a case report in which OCS emerged gradually after the remission of positive symptoms of schizophrenia. The CBT involved psycho education and case formulation, cognitive restructuring, exposure and response prevention (EPR), and behavioural experiments. Improvement in the compulsive behaviours led to a greater insight regarding the relationship between OCS and past experience of positive symptoms (e.g. hallucinations). The cognitive characteristics of the patient were discussed in light of current cognitive models of OCD.