Item of seating furniture (10; 110; 210; 310) in the form of a sofa or armchair having - a base (20; 120; 220; 320), - a seating surface unit (30; 130; 230; 330), - a backrest unit (40; 140; 240; 340) with a back contact surface (42; 142; 242), and - a headrest unit (50; 150; 250; 350) with a head contact surface (54; 154; 254), wherein - the headrest unit (50; 150; 250; 350) can be moved between a storage position and a functional position, in which the head contact surface (54; 154; 254) is substantially flush with the back contact surface (42; 142; 242), and - the headrest unit (50; 150; 250; 350) is arranged in such a way in the storage position that the head contact surface (54; 154; 254) is arranged completely behind the back contact surface (42; 142; 242) and below the top edge (42a; 142a; 242a) of the back contact surface, wherein - the headrest unit (50; 150; 250; 350) - can be pivoted about a headrest rotation axis fixed in relation to the base (20; 120; 220; 320) along a nonlinear movement path, or - can be moved along a linear movement path relative to the base, and - the backrest unit (40; 140; 240; 340) of the item of furniture can be moved relative to the base along a second movement path deviating from the nonlinear or linear movement path of the headrest unit (50; 150; 250; 350) and is provided for manual movement, characterized in that the movement of the backrest unit (40; 140; 240; 340) is coupled to the movement of the headrest unit (50; 150; 250; 350) via a movement mechanism of the headrest unit. - a base (20; 120; 220; 320), - a seating surface unit (30; 130; 230; 330), - a backrest unit (40; 140; 240; 340) with a back contact surface (42; 142; 242), and - a headrest unit (50; 150; 250; 350) with a head contact surface (54; 154; 254), wherein - the headrest unit (50; 150; 250; 350) can be moved between a storage position and a functional position, in which the head contact surface (54; 154; 254) is substantially flush with the back contact surface (42; 142; 242), and - the headrest unit (50; 150; 250; 350) is arranged in such a way in the storage position that the head contact surface (54; 154; 254) is arranged completely behind the back contact surface (42; 142; 242) and below the top edge (42a; 142a; 242a) of the back contact surface, wherein - the headrest unit (50; 150; 250; 350) - can be pivoted about a headrest rotation axis fixed in relation to the base (20; 120; 220; 320) along a nonlinear movement path, or - can be moved along a linear movement path relative to the base, and - can be pivoted about a headrest rotation axis fixed in relation to the base (20; 120; 220; 320) along a nonlinear movement path, or - can be moved along a linear movement path relative to the base, and - the backrest unit (40; 140; 240; 340) of the item of furniture can be moved relative to the base along a second movement path deviating from the nonlinear or linear movement path of the headrest unit (50; 150; 250; 350) and is provided for manual movement, characterized in that the movement of the backrest unit (40; 140; 240; 340) is coupled to the movement of the headrest unit (50; 150; 250; 350) via a movement mechanism of the headrest unit.