A dissertation submitted to Mzumbe University, Dar es Salaam Campus College in Partial Fulfillment of the requirements for the Award of the Degree of Master of Business Administration in Corporate Management (MBA- CM) of Mzumbe University.The general objective of the study was to investigate the influence of SACCOs to socio-economic improvement of its member’s income, a case of Kinondoni District. More specifically, the objectives of the study were: To evaluate the conditions of SACCOs on saving mobilization strategies to social-economic improvement to its members, to assess the responsiveness of the people in income improvement that is aimed by SACCOs to its members and to determine the role played by SACCOs in the social economy; and to give recommendation basing on the findings. Data collection methods employed in this research include interview and observation also data instruments was questionnaire and documentary analysis. Data being collected from different sources were presented in a textual and to provide data in a simple summary about the sample and measures through tables and they were processed through editing, coding, classification and interpreted to give a position of the research. Basing on the methodology and technique of data collection used by a researcher, the empirical data collected was evaluated and measured in numbers and percentages, in order to come up with her decision and conclusion on the effect of SACCOs to socioeconomic improvement of its member’s income. With regard to this perspective, 50% or more was used as a decision criterion in drawing conclusion. From the above percentage the researcher concluded that the SACCOs contribute to the income improvement of its members largely at business level and at house hold level. Basing on these findings and discussion, the following recommendations are brought to the attention of the SACCOs: should invite the large size of the members that will reduce the operating cost and that would imply to some reduction to the interest rates and by enjoy economics of scale by engaging in large business and to provide required knowledge and skills to its new members before provision of loan especially on entrepreneurship and loan management so that they can reduce the risk of failure and return of development to its active members.