Silvio Danailov (Bulgarian: Силвио Данаилов; born 21 April 1961) is a former Bulgarian chess player and International Master. He was a manager and coach of the Bulgarian men's national chess team (1993-2000) and manager and coach of two former FIDE world chess champions, GM Veselin Topalov (BUL) and GM Ruslan Ponomariov (UKR). Silvio Danailov was Honorary President of the European Chess Union (ECU) from 2014 until he resigned as such a year later, President of the European Chess Union (2010-2014) and Member of FIDE Presidential Board (2010-2014).