Abstract: Objective To review the experiences indiagnosis and treatment of third ventricle meningioma. Methods Clinicaldata about 26 patients with third ventricle meningioma indepartment of neurosurgery, Tiantan Hospital, Capital University of Medical University were analyzed retrospectively from February 2000 to June 2015, the clinical characteristics, the experience ofdiagnosis and treatment, and the prognosis were summarized, as well as its relevant literatures were reviewed. Results Nine meningiomas in the anterior third ventricle and 17 meningiomas in the posterior third ventricle were found. Gross total resection of the tumor was achieved in 22 patients, and subtotal resection was achieved in 4 patients, and the pathologydiagnosis of this tumor was confirmed to be meningioma. Fourteen patients were healed and 12 patients' condition were improved whendischarged from hospital. All patients were healed except one patientdied through a follow up of 1-15 years. Conclusion Meningioma of the third ventricle is a raredisease, a proper approach should be chosen according to the location of the meningioma. Poppen approach and the interhemispheric transcallosal interfornicial approach are common used in the operations of our study.