An armrest has a base, a sliding part movable translationally relative to the base between a first end position and a second end position, and first and second guides on base. One of the guides has a first bearing and a second bearing at least one of which is pivotal in a respective bearing seat. The other guide has a first guide bar and a second guide bar spaced apart in a movement direction and movable jointly in the movement direction relative to the respective first and second bearings. The first guide bar extends in a straight line along a first longitudinal axis and the second guide bar in a straight line along a second longitudinal axis. The first longitudinal axis and/or the second longitudinal axis extends at an angle to a straight line extending through a center of the first bearing and a center of the second bearing.