It has been recognised that catatonic symptoms can be associated not only with schizophrenia but also with affective disorders. Catatonic syndromes during postpartum affective episodes have rarely been described. We report a female patient suffering from recurrent depression with a diagnosis of postpartum major depressive episode with psychotic features who developed a catatonic syndrome. Her family history is positive for recurrent depressive disorder. She reported that the severe psychomotor retardation and mutism had a strong negative impact on her ability to care for her child. The administration of intravenous lorazepam led to a rapid improvement in the catatonic syndrome. Our case highlights the need for clinicians to be on the watch for the emergence of a catatonic syndrome, not only in cases of psychosis but also in cases of affective disorders, especially during the postpartum period.