| 1965 | P. J. Thomas | INC | 17064 | K. M. George | KC | 14972 |
| 1967 | P . P . R . M . Pillai | CPI | 24775 | P . J . Thomas | INC | 21733 |
| 1970 | P. J. Thomas | INC | 30027 | R. C. Unnithan | CPM | 23581 |
| 1977 | P.J. Thomas | INC | 30714 | R.C. Unnithan | CPM | 30277 |
| 1980 | V. S. Chandra Sekhar Pillai | CPM | 33107 | G. Gopinadhan Nair | INC(U) | 31054 |
| 1982 | V. S Chandrasekharan Pillai | CPM | 32744 | P. J. Thomas | INC | 31430 |
| 1987 | Chittoor Sasankan Nair | IND | 40059 | V. S. Chandrasekhran Pillai | CPM | 37767 |
| 1991 | A.. Padma Kumar | CPM | 42531 | C.P. Ramachandran Nair | IND | 41615 |
| 1996 | Adoorprakash | INC | 43474 | A.Padmakumar | CPM | 42668 |
| 2001 | Adv. Adoorprakash | INC | 54312 | Kadamminitta Ramakrishnan | IND | 40262 |
| 2006 | Adoor Prakash | INC | 51445 | V R Sivarajan | CPI(M) | 36550 |
| 2011 | Adv. Adoor Prakash | INC | 65724 | M. S. Rajendran | CPM | 57950 |
