Ömer Hasan Şişmanoğlu (born 1 August 1989) is a Turkish professional footballer who plays as a striker for Iğdır.

Şişmanoğlu joined FC St. Pauli on 1 July 2007 on a free transfer.

[2][3] On 23 June 2009, Şişmanoğlu left FC St. Pauli and signed a four-year deal with Kayserispor.

Five days after signing for Antalyaspor, Şişmanoğlu moved to Beşiktaş for £1.49 million.

He scored on his debut for Besiktas against Eskişehirspor, which ended 1–0 in favor of Beşiktaş, on 5 October 2013.

On 7 August 2017, after returning from his loan to Antalyaspor, Şişmanoğlu was sold to Göztepe on a free transfer.

Şişmanoğlu was born in the Wilhelmsburg quarter of Hamburg, West Germany.