Egidio Meneghetti (14 November 1892 – 4 March 1961) was an Italian pharmacologist, professor at the University of Padua, and a part of the anti-fascist resistance movement. He contributed to studies on the injection of colloidal substances into the bloodstream for chemotherapy. He demonstrated that colloidal metal ions such as an antimony compound injected slowly into the blood stream could reach the bone marrow and affect red blood cell production.