Prannok Pier, also known as the Siriraj Pier or Wang Lang Pier (Thai: ท่าพรานนก, ท่าศิริราช, ท่าวังหลัง) with designated pier number N10, is a pier on the Chao Phraya River located at the Siriraj Subdistrict, Bangkok Noi District in the area adjacent Siriraj Hospital and Wang Lang Market.