Abstract: Environmental security has been occurred a significant aspect in the context of world security studies since 80th and 90th decade in the last century. Today world is facing a serious environmental threat. Environmental threats are usually non-military character. Although environmental issues and forms of environmental concerns have long history though it was given and increasingly political character after the Second World War especially after the signed of Kioto-Protocol the environmental security has been developed as a non-military threat of inter-state relationship the security threat. The field of environmental security increasingly recognize for it’s contributions to explaining and offering solutions to the regional conflicts that threaten international stability. In the context of indo-Bangladesh relations a number of irritating issues which are threaten the environmental security of Bangladesh such as water and boundary issues are the main issues.