Armrest device for vehicle

An armrest device for a vehicle, the armrest device comprising:

• a tray module configured to provide a cup holder function, an article storage function, and a table function;
• a frame module configured to enclose a periphery of the tray module and coupled to a rear seat of the vehicle;
• and
• a cover module configured to cover the tray module,
• wherein the tray module comprises:
• a tray provided with a storage space;
• a tray cover coupled to the tray and formed with a connecting window connected to the storage space;
• and
• a plurality of slide covers slidably coupled to the tray cover and configured to slide relative to the connecting window into one of a completely open position, a partially open position, or a closed position of the connecting window, such that in the partially open position, the plurality of slide covers is configured to serve as a cup holder.