Armrest for a vehicle seat, comprising: - an armrest arm having an upper support surface forming a support for the forearm of an occupant of the vehicle seat, and - a user interface having at least one display portion, having a front face comprising a screen and a rear face, the user interface being mounted on the armrest arm so as to be movable between a retracted position where the screen is inaccessible and an extended position where the screen is accessible, wherein the rear face of the display portion forms a shell and in the retracted position, the shell is integrated with the upper support surface of the armrest arm and forms a support region for at least part of the forearm of the occupant of the vehicle seat, and in the extended position of the user interface, the screen is at least partially projecting above the upper support surface of the armrest arm, and wherein the user interface is mounted to be pivotable about an axis of rotation and further comprises a control portion integral with the display portion, the control portion having a front face (14B1) and a rear face (14B2), the front face (14B1) having an input interface and being arranged to be inaccessible when the user interface is in the retracted position, the armrest arm having a through-opening which accommodates the control portion in the extended position. - an armrest arm having an upper support surface forming a support for the forearm of an occupant of the vehicle seat, and - a user interface having at least one display portion, having a front face comprising a screen and a rear face, the user interface being mounted on the armrest arm so as to be movable between a retracted position where the screen is inaccessible and an extended position where the screen is accessible, wherein the rear face of the display portion forms a shell and in the retracted position, the shell is integrated with the upper support surface of the armrest arm and forms a support region for at least part of the forearm of the occupant of the vehicle seat, and in the extended position of the user interface, the screen is at least partially projecting above the upper support surface of the armrest arm, and wherein the user interface is mounted to be pivotable about an axis of rotation and further comprises a control portion integral with the display portion, the control portion having a front face (14B1) and a rear face (14B2), the front face (14B1) having an input interface and being arranged to be inaccessible when the user interface is in the retracted position, the armrest arm having a through-opening which accommodates the control portion in the extended position. the user interface being mounted on the armrest arm so as to be movable between a retracted position where the screen is inaccessible and an extended position where the screen is accessible, wherein the rear face of the display portion forms a shell and in the retracted position, the shell is integrated with the upper support surface of the armrest arm and forms a support region for at least part of the forearm of the occupant of the vehicle seat, and in the extended position of the user interface, the screen is at least partially projecting above the upper support surface of the armrest arm, and wherein the user interface is mounted to be pivotable about an axis of rotation and further comprises a control portion integral with the display portion, the control portion having a front face (14B1) and a rear face (14B2), the front face (14B1) having an input interface and being arranged to be inaccessible when the user interface is in the retracted position, the armrest arm having a through-opening which accommodates the control portion in the extended position.