The Emminger Decree or Emminger Reform (German: Emminger Verordnung, Lex Emminger, or Emmingersche Justizreform; formally the Verordnung über Gerichtsverfassung und Strafrechtspflege) was an emergency decree in the democratic Weimar Republic by Justice Minister Erich Emminger (BVP) on 4 January 1924 that among other things abolished the jury as trier of fact and replaced it with a mixed system of judges and lay judges in Germany's judiciary which still exists today.
The modern jury trial was first introduced in the Rhenish provinces in 1798, with a court consisting most commonly of 12 citizens (). A Swabian ordinance of 1562 had also called for the summons of jurymen (urtheiler), and various methods were in use in Emmendingen, Oppenau, and Oberkirch.Hauenstein's charter of 1442 secured the right to be tried in all cases by 24 fellow equals, and in Friburg the jury was composed of 30 citizens and councilors. In Constance the jury trial was suppressed by decree of the Habsburg Monarchy in 1786. The Frankfurt Constitution of the failed Revolutions of 1848 called for jury trials for "the more serious crimes and all political offenses" but was never implemented.