The Japanese Federation of Chemical Industry Workers' Unions (Japanese: 全国化学産業労働組合同盟, Kagaku Domei) was a trade union representing workers in various industries in Japan.

The union was established on 16 June 1951, with the merger of unions representing chemical and general workers; rubber workers; and workers in the tyre-manufacturing industry.^[1] It affiliated to the General Council of Trade Unions of Japan, and by 1958 it had 41,644 members.^[2] The affiliates representing rubber workers split away in 1965, to form the National Federation of Rubber Industry Workers' Unions,^[1] and as a result, by 1970 its membership had declined to 32,963. In 1972, it absorbed the All Japan Glass and Bottle Makers' Union.^[3] In 1978, it merged with part of the Japanese Federation of Synthetic Chemistry Workers' Unions, to form the Japanese Federation of Chemical Workers' Unions.^[1]