Split Film Probe (hereafter SFP) is a hot-film anemometer that has two films. SFP can measure two-dimensional direction and magnitude of flow velocity. However, there has not been much research carried out about the impact of prongs and measurement accuracy of the probe. The purpose of this study is to investigate the quantitative characteristics of the SFP. To identify the characteristics of SFP, two kinds of measurements are carried out. One is a measurement of uniform flow field with different angles of incidence of the SFP probe. The other is a measurement of wake flow field of square cylinder; the results are compared to CFD results. From the results it was visible that, at the wake RMS was different due to the influence of prongs. However the results from other places were in agreement with the quantitative results. Hence, it can be concluded that, although the SFP is an effective method that has high accuracy, to perform accurate measurement it is necessary to consider the characteristics of flow patterns and carefully choose the direction of prongs so that the prongs do not affect the flow.