In our study the role of Multi-slice CT angiography in the evaluation of conotruncal and pulmonary venous anomalies was assessed, it enrolled 30 patients (18 males and 12 females) with an age range between 30 days - 14 years (mean age 44 months). it included 17 patients with conotruncal anomalies, 7 patients with pulmonary venous anomalies and six patients with mixed conotruncal and pulmonary venous anomalies. All patients included in this study were initially examined by echocardiography and MSCT angiography and only five patients were examined by catheterization.