Khun Ying Jamsai Silpa-archa (Thai: แจ่มใส ศิลปอาชา, RTGS: Chaemsai Sinlapa-a-cha, IPA: [t͡ɕɛ̀m.sǎj sǐn.lá.pà.ʔaː.t͡ɕʰaː]; born 20 April 1934), née Lekhawat (Thai: เลขวัต, IPA: [leː.kʰà.wát]), is the widow of Banharn Silpa-archa, the 21st Prime Minister of Thailand and Thai Nation Party Leader. They have three children: one son, Varawut (married to Suwanna Raiwin), and two daughters, Kanchana and Parichat.