The paper ‘On Contribution of Informal Sector in Indian Economy’ by Dr. A.C. Kulshreshtha and Dr. Gulab Singh briefly surveys the definition and coverage of informal sector. Definition and coverage of unorganised segments of the Indian Economy have also been discussed as the authors mainly studied the informal sector characteristics by using the available data on these segments. In order to examine the size of the informal sector in the Indian economy, the working force in Organised Sectors (defined clearly for various industrial sectors in the case of Indian economy) are subtracted from the corresponding working force estimates for the various industrial sectors of the total economy obtained by using Census/ National Sample Survey Household Employment and Unemployment Survey results for the year 1993-94. Also the contribution of the informal sector to the value addition through the estimates of gross domestic product of unorganised segments of various economic activities have been examined for the years 1993-94 and 1996-97