Aim: Intraoperative ultrasound imaging is used in brain tumor surgery to identify tumor remnants. In this study, we aimed to evaluate the resection success of the brain lesions in different nature using ultrasonography (USG) and to analyze the effects of USG. Material and Method: USG assisted surgical resection was performed in 23 patients who had a preliminary diagnosis of brain tumors in our hospital. The resection borders and residual tumor tissue were checked intraoperatively by USG and postoperatively by magnetic resonance imaging in all patients. Results: The borders, cavities, and locations of operated 8 patients with glial tumors, 6 patients with meningiomas, 7 patients with metastases and 2 patients with intracranial abscesses were all determined with accuracy. Glial tumors were hypoechoic, and meningiomas were hyperechoic in USG, and the borders could be clearly distinguished. Difficulty in determining the exact border of the tumor was experienced only in tumors with large edema and diffuse nature. Gross total excision was achieved in all cases, and no additional neurological deficit was observed in any patient. Discussion: Color Doppler USG shows the relationship between the brain lesions and vascular structures, and this increases the success of the surgery. Another advantage of the USG is the real-time intraoperative determination of the resection degree, low cost, and the device being portable.