He was the former Minister for Rural Development, Planning & Culture of the Government of Kerala from the year 2011 to 2016.

Thresiamma Chacko; born at Poovam near Changanassery on 3 June 1946; M.A., LLB; Advocate; social and Political Worker.

He completed his pre degree and BA Economics from SB College Changanasserry and Entered Politics through All Kerala Balajana Sakhyam and KSU.

Was General Secretary of All Kerala Balajana Sakhyam; President, KSU Kottayam District Committee; Vice President, KSU State Committee; Secretary, Kerala University Union; General Secretary, National Council of National Students Union of India; Was President Kerala Pradesh Youth Congress; Was Member, Kerala University Syndicate, Executive Committee of Kerala Agricultural University; Convener, Standing Committee of Syndicate on Finance; Managing Editor, "Socialist Youth" Weekly.

He was elected from Irikkur Constituency to the Kerala Legislative Assembly representing Indian National Congress continuously from 1982 to 2021.