Hematopoietic stem cells (HCS), CD34+ cells are considered the endothelial progenitor cells. They also can differentiate to vessel in the special circumstance. To understand angiogenesis in tumor condition, CD34+ cells were cultured with Glioma (C6). This study aimed to determine the effect of CD34+ cells on the angiogenesis in C6 glioma cells. Confluent monolayer C6 glioma cells were maintained in culture medium for 12 days either with or without CD34+ cells. The expression of CD31, CD 34, glial fibrilliary acidic protein (GFAP) and α-internexin antibodies in these cells were examined using flow cytometry, TEM(transmission electron microscope) and immunofluorescence staining. The results showed capillary endothelial–derived cells expressing CD31 and CD 34 positive. The significant reduction in the number of GFAP- and α-internexin-positive cells in C6 glioma cells co-cultured with CD34+ cells. These findings suggested that the presence of CD34+ cells produced inhibitory effect on survival of differentiated C6 glioma cells leading to the reduction on cell numbers and their protein expression.