Abstract: This study was carried out to examine the contributions of academic staff union of universities as a trade union to educational development in Nigeria. Since ASSU as a trade union has been noted for her effectiveness of teaching and learning activities in our universities in Nigeria, her contributions to educational development in Nigeria is worth pursuing. Effort was made to define trade union and labour unionism in education sector and as recognised organisation in Nigeria according to Decree 91 of 1993. This study contends that ASUU as a trade union that replaces Association of University Teachers (AUT) in education sector is contributing numerously to the development of education in Nigeria. It is recommended that ASUU`s progress towards professionalism and quality, impact towards quality assurance, educating of members, good communication gap and study on societal expectations are desirable for Nigerian educational development.