To determine whether intracameral bevacizumab decreases vascular leakage from iris rubeosis in patients with neovascular glaucoma. Interventional case series. The study included six eyes of three patients with secondary neovascular glaucoma due to proliferative diabetic retinopathy (n = 2) or ischemic central retinal vein occlusion (n = 1). All patients received an intracameral injection of 1.0 mg bevacizumab. Morphologic changes and vascular leakage were investigated prospectively by iris fluorescein angiography. Decrease in leakage was detected as early as one day after injection. No inflammation was observed. No relapse was seen within the follow-up of four weeks. Intraocular injection of bevacizumab may provide an additional strategy for the treatment of iris rubeosis in neovascular glaucoma.