Background:-Breast cancer is the most common malignancy in female ,world wide.There is a role for screening techniques in reducing the incidence and there by morbidity of the disease. The present study aims to find out the role of Doppler findings in differentiating benign and malignant breast lesion . Materials and methods:The study was done as diagnostic test evaluation in Department of Radiodiagnosis,who came for mammogram. Fifty patients with palpable breast lesion were included in the study. Those patients with palpable breast lesion were subjected to grey scale and colour Doppler sonography. Doppler patterns were classified into four different patterns. Results: The presence of blood flow shows high sensitivity and low specificity in differentiating benign and malignant breast lesion. The degree of vascularity is more in malignant lesion. It was shown that turbulent, high impedence flow, and venous flow were seen more in malignant lesion,when compared to benign . Conclusion: Doppler by iteslf cannot characterize the lesions into benign and malignant lesion . When used in conjunction with conventional examination it can provide a more accurate diagnosis.