The Socialist Party (PS) was created at a conference of Portuguese Socialist Action (ASP), at that time in exile, on 19 April 1973, in Bad Münstereifel in West Germany.
Partai Sosialis (PS) didirikan pada konferensi Gerakan Sosialis Portugal (ASP) yang waktu itu berada di pengasingan pada 19 April 1973 di Bad Münstereifel, Jerman Barat.