Knowledge transfer is one of the significant elements in the knowledge management process. Knowledge transferors share different types of knowledge with the recipients with a view to fulfilling the latter's knowledge needs. The importance of identifying the appropriate knowledge transfer mechanisms and the barriers to knowledge transfer are paramount. However, neither the knowledge management literature nor the NGO-sector literature has adequately addressed the issues of causes of knowledge transfer, taxonomies of knowledge, mechanisms and barriers of knowledge transfer in comprehensive way in the context of the Bangladeshi NGO sector. The highest number of NGOs in the world is deployed in Bangladesh. Little is known about such transfer within the NGO context based in Bangladesh. This paper makes an endeavour to bridge these grey areas of knowledge management and NGO-sector. Having collected the qualitative data from Bangladeshi NGOs and using the content analysis technique, the study identified the causes of knowledge transfer, taxonomies of knowledge, mechanisms of knowledge transfer and the barriers to knowledge transfer in the context of Bangladesh. By understanding the mechanisms and the determinants of knowledge transfer, company and NGO managers and public policy makers can influence knowledge transfer more effectively. Future researchers may extend this study by carrying out similar research in a different context.