During the 2005–06 season, Red Star Belgrade participated in the 2005–06 Serbia and Montenegro SuperLiga, 2005–06 Serbia and Montenegro Cup and 2005–06 UEFA Cup.
Season summary.
Red Star won their ninth double in this season.
Results.
UEFA Cup.
Second qualifying round.
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
First round.
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
Group stage.
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
 ;templatestyles src="Template:Football_box_collapsible/styles.css" / ;
References.
 ;templatestyles src="Reflist/styles.css" / ;