Matey Iliyanov Kaziyski (Bulgarian: Матей Илиянов Казийски) (born 23 September 1984) is a Bulgarian professional volleyball player, member of Bulgaria men's national volleyball team during 2003–2012 and Italian club Trentino Volley, a participant of the Olympic Games Beijing 2008, bronze medalist of the World Championship 2006, World Cup 2007 and European Championship 2009.

As a child he trained different sports like football, basketball and horse riding.

Kaziyski and Radostin Stoychev have been working together since 2004 in the clubs of Slavia Sofia, Dynamo Moscow, Halkbank Ankara and Trentino.

In 2015 he left Trentino Volley to play in the Japanese top championship.

In 2012 Kaziyski left the Bulgaria men's national volleyball team, together with coach Radostin Stoytchev, due to a scandal with Bulgarian Volleyball Federation (BFV).