1965 | K. K. Gopalan Nair | KC | 17651 | P. Ramalinga Ayyar | CPI | 15287 |
1967 | Ramalingom | CPI | 25804 | P . Raghavan | IND | 12970 |
1970 | Thegamom Balakrishnan | CPI | 23285 | Damodaram Unnithan | CPM | 20005 |
1977 | Thennala Balakrishna Pillai | INC | 31214 | Mathew Muthalali | KCP | 23826 |
1980 | C. P. Karunakaran Pillai | CPM | 31639 | Thennala Balakrishna Pillai | INC(I) | 28326 |
1982 | Thennala Balakrishna Pillai | INC | 30911 | C. P. Karunakaran Pillai | CPM | 29173 |
1987 | R. Unnikrishna Pillai | CPM | 37990 | Thennala Balakrishna Pillai | INC | 36764 |
1991 | Thiruvanchoor Radhakrishnan | INC | 44147 | R. Unnikrishna Pillai | CPM | 38380 |
1996 | Thiruvanchoor Radhakrishnan | INC | 47907 | K.N.Balagopal | CPM | 38706 |
2001 | Thiruvanchoor Radhakrishnan | INC | 53034 | Pallickal Prasannakumar | IND | 37694 |
2006 | Thiruvanchoor Radhakrishnan | INC | 53416 | Prof. D K John | KEC | 34952 |
2011 | Chittayam Gopakumar | CPI | 63501 | Pandalam Sudhakaran | INC | 62894 |