目的　介绍并探讨一种切除三脑室肿瘤的手术入路。方法　经胼胝体 穹窿间入路切除三脑室肿瘤 91例。结果　显微镜下全切除 41例 ,近全切除 41例 ,大部切除 9例 ,死亡 1例。结论该手术入路可以切除三脑室前、中、后部的肿瘤 ,术野暴露清楚 ,不易造成穹窿、丘脑、大脑内静脉、丘纹静脉的损伤 ,减少了术后并发症的发生 Objective To introduce and discuss a surgical approach to resect tumors of the third ventricle. Methods The corpus callosum vault was excised from the three ventricle tumors in 91 cases. RESULTS: 41 cases underwent total resection under microscope, 41 cases underwent total resection, 9 cases underwent radical resection and 1 died. Conclusion The surgical approach can excise the tumors in the anterior, middle and posterior parts of the third ventricle. The exposure of the surgical field is clear and the damage of the dome, the thalamus, the intracerebral vein and the mound vein is not easy and the postoperative complications are reduced.