
| Year | Winner | Vote Share | Runner Up | Runner Up Vote Share | Vote Margin |
|---|---|---|---|---|---|
| 2004 | S. Ajaya KumarCPM | 49.07% | K A ThulasiINC | 40.35 | 8.73 |
| 1999 | S. AjayakumarCPM | 46.32% | Pandalam SudhakaranINC | 44.56 | 1.77 |
| 1998 | S. AjayakumarCPM | 46.87% | Prof: K.k. VijayalakshmiINC | 44.11 | 2.77 |
| 1996 | S. AjayakumarCPM | 47.45% | Vijayalakshmi K KINC | 44.07 | 3.38 |
| 1991 | K.r. NarayananINC | 48.28% | Lenin RajendranCPM | 46.06 | 2.23 |
| 1989 | K. R. NarayananINC | 48.97% | Lenin RajendranCPM | 45.32 | 3.66 |
| 1984 | K. R. NarayananINC | 54.74% | A. K. BalanCPM | 44.26 | 10.48 |
| 1980 | A.k. BalanCPM | 52.58% | V. EacharanINC(I) | 46.52 | 6.06 |
| 1977 | K. KunhambuINC | 54.16% | C. K. ChakrapaniCPM | 45.84 | 8.32 |