Capillary hemangioma is a benign vascular tumor often observed in the skin and soft tissues of neonates and infants, and is rarely reported in the intraparenchymal central nervous system (CNS). We present a rare case of an intraparenchymal capillary hemangioma that was difficult to diagnose from preoperative imaging. A 57-year-old woman presented to the emergency department with a first episode of generalized seizure. Non-contrast computed tomography scan revealed a well-defined, high-density lesion measuring 3cm and surrounded by perifocal edema in the left pars opercularis. On magnetic resonance imaging, the lesion was hypointense on T1-weighted image and hyperintense with multiple flow voids on T2-weighted image, and showed uniform strong enhancement using gadolinium. Diffusion-weighted image (DWI) revealed a hypointense signal, and magnetic resonance spectroscopy (MRS) lacked peaks of creatinine and N-acetyl acetate within the lesion. 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) showed a lower uptake in the tumor than in the normal cortex. Hemangioblastoma, intraparenchymal meningioma, solitary fibrous tumor, metastasis, and glioma were considered preoperative differential diagnoses, but none of these met the typical findings. Following surgery, the histopathological diagnosis was capillary hemangioma. Since only five cases of capillary hemangioma of the intraparenchymal CNS have been reported thus far, preoperative diagnosis was difficult. Advanced imaging techniques such as DWI, MRS, and FDG-PET have not been reported before this case and may be useful to differentiate this rare disease from other tumors. Accumulation of cases is necessary to establish the clinical significance of preoperative imaging to diagnose intraparenchymal capillary hemangioma before surgery.