Informal sector is that part of an economy which is not monitored or taxed by any form or government. The income generated from this section of economy is not included for calculating the GNP of the country. This part of economy exists even in the developed nations. This sector is often associated with the terms poverty, poor standard of living, lack of security, denial of health care etc., in a developing country like India the dominance of informal sector is high. Women constitute more than half of India's population. They form the major segment of India's informal market sector. They are forced to take up employment opportunities due to their poor financial and societal background. This paper aims to study the Women entrepreneurs in informal sector based at Chennai.