Armrest arrangement for a vehicle seat, and vehicle seat with such an armrest arrangement

An armrest arrangement for a vehicle seat, with an armrest body which is connectable to the vehicle seat by means of a fastening device, wherein the fastening device has a fastening receptacle on a seat side and a fastening extension complementary to the fastening receptacle on the armrest body, and with a locking system for releasable securing of the fastening extension inside the fastening receptacle in a fitted end position in which the fastening extension sinks into the fastening receptacle coaxially to a fitting axis, wherein the fastening receptacle or the fastening extension has at least one locking body movably mounted radially to the fitting axis, in that the fastening extension or the fastening receptacle has at least one locking recess complementary to the locking body and into which the locking body can radially sink, and in that an actuator mounted for linear movement is provided coaxially or axis-parallel to the fitting axis and is in operative connection to the at least one locking body in order to move the locking body into a locking position or into a release position.