Søren Willadsen was a Danish furniture maker from the 1940s to the 1960s. 
Søren Willadsen mainly produced seating, armchairs, chairs and sofas for the Danish designers Kristian Solmer Vedel , Fin Juhl, Illum Wikkelsø, Nana Ditzel, for whom he made the famous office in teh 3 or 4 drawer version, in 1958. In 1963, Søren Willadsen produced the Modus series by Kristian Solmer Vedel.