Device for a reclining chair or functional sofa with an adjustable back support and an adjustable headrest, where the device when the back support is moved is adjusted to influence the headrest angle relative to the back support in such a way that the headrest is rotated from an almost vertical plane to an angle in relation to the back support when the back support is reclined, while at least one rotatable joint in between the headrest and the back support is connected with at least one frictional part by the use of at least one strut in such a way that a user with his/her head or other force can rotate the headrest backwards or forward as so desired when the back support is in desired reclined position.