Concrete Placing Booms(CPB) are generally used for concrete placement at construction site. such as building, apartment, bridge, road and metro. However there is no standards for CPB, it just follows local or organization standards so far. In order to provide specific on terminology and commercial specifications of Concrete Placing Booms, TC 195 / SCl working group 3 that developed Concrete placing system was organized in the ISO. Korea has contributed to WG 3 as the convener(also project leader) since 2012. Now the standardization of CPB is m progress and is expected to be published officially as international standard, ISO 17740-1 in 2016. This paper will be reported detailed processes of standardization of CPB under Korea s leadership and positive effects of Korea s international standardization activities.