Research has shown the importance of sex differences for various aspects of schizophrenia. This study focused on sex-related differences in thought processing as shown in the Rorschach test. Thirty-six schizophrenic patients (18 men and 18 women) were tested with the Rorschach in accordance with the Comprehensive System. The results showed that the female patients were more active in handling information input but showed more impairment in conceptualization. The male patients showed more perceptual disturbance. It was concluded that the Rorschach might add information in differentiating among subtle thought disturbances. It might even be useful to detect relationships between thought processes and neuroleptic medication.