Miklós "Miki" Fehér (20 July 1979 — 25 January 2004) was a Hungarian footballer who played as a striker.

On 25 January 2004, Fehér died of a cardiac arrest during a match between Vitória de Guimarães and his team Benfica in Guimarães, Portugal.

On 25 January 2004, Benfica travelled to Guimarães to play against Vitória de Guimarães. The game was being broadcast live on television, and Benfica were leading 1–0. Fehér had just come on as a substitute, and assisted another player brought from the bench, Fernando Aguiar, for the match's only goal, but received a yellow card in injury time and suddenly bent forward, seemingly in pain. He then fell backwards to the ground.

Members of both teams rushed immediately to aid Fehér before medical personnel arrived on the pitch. CPR was performed as match participants looked on in visible distress. An ambulance arrived on the pitch and Fehér was rushed to the hospital. His condition was covered by the Portuguese media throughout the day. However, before midnight, his death was confirmed, the cause of death being cardiac arrhythmia, brought on by Hypertrophic cardiomyopathy. In his memory, Benfica retired the number 29 shirt, which he wore during his time at the club. He was remembered by many and his death caused a profound shock in Portuguese sports. Among others, Porto director of football Reinaldo Teles and manager José Mourinho paid their respects at the Estádio da Luz, where the player's body remained before his burial in his native Hungary.

A club delegation, which included the entire squad, travelled to Hungary, presenting Fehér's parents with the 2004–05 league championship medal, in respect for the player and his time with the club.

On 9 October 2009, the day before their World Cup qualifier against Portugal in Lisbon, the Hungarian national team squad laid a wreath next to a metal bust of Feher at Benfica's homeground Estádio da Luz, in tribute to his memory.