We presented a case of previous healthy postpartum woman suffering from seizure of sudden onset with conscious change and anisocoric pupils. Head magnetic resonance imaging (MRI) revealed multiple high signal-intensity lesions on fluid-attenuated inversion recovery (FLAIR) / T2 weighted image (T2WI) in bilateral subcortical white matters (especially the parieto-occipital areas), brain stem, and bilateral cerebellum, and mild high signal-intensity lesions on diffusion weighted MRI (DWI). These neurological and radiological anomalies recovered completely later. The final diagnosis was the rare presentation of late postpartum eclampsia as reversible posterior encephalopathy syndrome (RPES).