Kadavoor Sivadasan (also known as K. Sivadasan) (11 March 1932 – 17 May 2019) was a Minister in the Indian state of Kerala, Political leader, a noted advocate, and trade unionist from Kerala, India.

Sivadasan got elected to the Kerala Legislative Assembly for first time in 1980 contesting as an RSP candidate.

[2] He served as Minister for Forests and Wildlife from 20 April 1995 to 9 May 1996 in the Ministry headed by A. K. Antony; again he was the Minister for Electricity from 26 May 2001 to 11 February 2004 and held the portfolios of health and family welfare from 11 February 2004 to 29 August 2004 in the ministry, also headed by A. K.

[citation needed] An active trade unionist, Sivadasan served as Secretary of Kerala Provisional United Trade Union Congress in 1977,[citation needed] and participated in the International Labour Organization (ILO) conference in Geneva representing Central Government in 1985.

[citation needed] He also visited Italy, Switzerland, France, Germany and United Arab Emirates in various capacities.