Argentina overcame defending champion France 4-2 on penalties after a 3-3 extra-time draw.
Emiliano Martinez stopped Kingsley Coman’s penalty, and Aurelien Tchouameni missed to secure Argentina their third global title.
Kylian Mbappe scored twice in two minutes, including an 80th-minute penalty, to equalize for France.
The France striker completed his hat-trick in the 118th with another penalty shot after Lionel Messi’s 109th goal.
Messi converted a 23rd-minute penalty to put Argentina ahead 2-0 in the first half.
Alexis Mac Allister’s cutback found Angel Di Maria, who scored again.