Belgium participated in the Eurovision Song Contest 2015 with the song "Rhythm Inside", written by Loïc Nottet and Beverly Jo Scott. The song was performed by Loïc Nottet, who was selected by the Belgian broadcaster Radio Télévision Belge de la Communauté Française (RTBF) in November 2014 to represent the nation at the 2015 contest in Vienna, Austria. "Rhythm Inside" was internally selected as the song Loïc Nottet would perform at Eurovision and later premiered in March 2015. In the first of the Eurovision semi-finals "Rhythm Inside" placed second out of the 16 participating countries, securing its place among the 27 other songs in the final. In Belgium's fifty-seventh Eurovision appearance on 23 May, "Rhythm Inside" finished in fourth place, receiving 217 points and full marks from three countries.

Prior to the 2015 contest, Belgium had participated in the Eurovision Song Contest fifty-six times since its debut as one of seven countries to take part in 1956. Since then, the country has won the contest on one occasion in 1986 with the song "J'aime la vie" performed by Sandra Kim. Following the introduction of semi-finals for 2004, Belgium had been featured in only three finals. In 2014, Axel Hirsoux represented the country with the song "Mother", placing fourteenth in the semi-finals and failing to advance to the final.

The Belgian broadcaster for the 2015 Contest, who broadcast the event in Belgium and organised the selection process for its entry, was Radio Télévision Belge de la Communauté Française (RTBF). The Belgian participation in the contest alternates between two broadcasters: RTBF and Vlaamse Radio- en Televisieomroep (VRT). Both broadcasters have selected the Belgian entry using national finals and internal selections. In 2013, RTBF internally selected the winner of the most recent series of The Voice Belgique, Roberto Bellarosa to represent the nation, while in 2014, VRT organised the national final Eurosong in order to select the Belgian entry.

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