Eugeniusz Piasecki (13 November 1872 in Lwów – 14 July 1947 in the village of Ptaszyn near Cieplice Śląskie-Zdrój) was a Polish physician, promoter of sports and hygiene and boyscouting activist.
He was the son of Wenanty Piasecki, a gym teacher at Lwów's schools and member of Gymnastic Society Sokol.
Eugeniusz studied medicine at the Jagiellonian University in Kraków, and there he became familiar with ideas promoted by Henryk Jordan.
[citation needed] During World War I he moved to Kiev, where lectured hygiene in local Polish University Collegium.
Stanisław Piasecki later recanted his antisemitic views before his own murder, alongside many other Polish Catholics and Jews, at the hands of the Germans.