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 (Y) 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 (Y) 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 (Y) 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. <EOS>