Background: Around the world breast cancer is the most common cancer in women. In India, peak incidence is between 45-50 years of age. Early diagnosis improves survival, hence reducing diagnostic delay in breast cancer will have major social and economic implications besides improving the quality of life. This observational study aims to decipher various factors influencing diagnostic delay so that early treatment can be instituted.Methods: We interviewed 212 consecutive patients who attended the twice weekly breast clinic conducted by Department of general surgery and department of radiotherapy, government medical college, Kozhikode between September 2014 and February 2015. All patients with primary breast cancer were included in the study. Exclusion criteria included recurrence, second primaries, history of partial treatment and incomplete records. Finally, we interviewed 202 patients with the help of a pretested semi-structured questionnaire.Results: In present study, the commonest age group was 40-50 years with 62.4% participants presenting with early breast cancer and 37.6% having advanced breast cancer. Most of present study subjects were educated up to high school and unemployed. Awareness about breast cancer was 74.25% but many were ignorant of its symptomatology. Practice of breast self-examination (BSE) was low at 32.1%. Side and quadrant were statistically significant factor.Conclusions: In present study religion, educational status, marital status, breast cancer awareness, practice of BSE and location of tumor were statistically significant factors influencing delay in diagnosis. There was a general lack of knowledge about the importance of self-examination in breast cancer which needs health education and need for active social propaganda in print and electronic media regarding its importance. In future institution of a screening programme will hasten diagnosis and improve survival of breast cancer patients.