Sri Lanka Standards Institution (SLSI) is the National Standards Body of Sri Lanka, established under the Bureau of Ceylon Standards Act No. 38 of 1964. The Institution functioned under the name of Bureau of Ceylon Standards until the Act was repealed and replaced by the Sri Lanka Standards Institution Act No. 6 of 1984. The Institution now functions under the Ministry of Technology and research and is governed by a Council appointed by the Minister in terms of the above Act.
SLSI by virtue of being the National Standards Body in Sri Lanka is a member of the International Organization for Standardization (ISO) which is based in Geneva. As members of the ISO, National standards Bodies exchange on reciprocal basis copies of their National standards and is responsible for disseminating information on standards, technical regulations and standards related activities to the community at national level.