The King's Justice (or the Queen's Justice in the case of a female sovereign) is the title held by the royal executioner. His duty is to kill anyone condemned by the King, the Hand of the King, or the small council, usually by public beheading.
Other uses of the term
- "Behold the King's Justice."
- ―Lysa Arryn
In the Eyrie, the term refers to the Moon Door, a hatch-like door in stronghold's great hall, which opens to the hollow bottom of the mountain in which the castle rests. The Moon Door is used to carry out executions instead of employing headsmen.
Meanwhile in the North, where the customs of the First Men are still followed, most lords carry out the King's justice personally, due to the belief that whoever passes a death sentence should also swing the sword.