Background: Biliary dyskinesia (BD) is characterized by symptoms of biliary disease, no evidence of gallstones on ultrasonography (USG), and diminished gallbladder ejection fraction. Aim of the work: The aim of the current study is to evaluate the role of ultrasound in gall bladder dyskinesia. Patient and methods: 30 cases were referred from Tropical Medicine, All of these cases were complaining of generalized abdominal pain, heart burn, brubing and epigastric pain, Patients were asked about a history of endoscopic examination or any lab tests. Transabdominal ultrasound examination was carried out with the Patient lying flat using 3.5-5Mhz convex probe. Results: the US mean volume pre-meal of the studied cases was 18.27 (±2.16 SD) with range (14-21) ml, the mean volume post-meal of the studied cases was 9.53 (±4.38 SD) with range (3-17) ml and the mean ejection fraction was 47.19 (±24.21 SD) with range (15-85.7). Conclusion: ultrasound is valuable non-invasive tool in diagnosis of patients with dyskinesia symptoms. A skilled ultrasonographer can examine most abdominal organs and often detect lesions that are not demonstrated by radiography.