He served as the deputy chairman of Phayathai District Council from 1985 until 1989.[1] He was first elected as an MP representing Songkhla in southern Thailand beginning in 1992.[1] He remained a Democratic member of parliament for Songkhla until his death in 2009.[1]
Winai died at 11am on October 20, 2009, at the National Cancer Institute in Bangkok, Thailand, at the age of 51.[1] He had been battling liver and colon cancer for the last three years of his life.[1][3]
Winai's body was moved on October 22, 2009, to the Kho Hong temple in Songkhla's Hat Yai district for his funeral.[1]
