An armrest with cup holder for a vehicle seat that includes an elongate armrest can of the armrest adapted to be carried by the seat. An elongate storage area is formed in the armrest can, and the cup holder is mounted for movement along a longitudinal axis of the armrest between a stowed position within the storage area of the armrest can and a deployed position forward of and to the exterior of the armrest. When stowed, the cup holder is positioned fully within the armrest can. The tray table of the seat can therefore be used for purposes other than supporting a beverage container, and can be used when the tray table is stowed.