A footrest comprising: a footplate; a scissor structure comprising first and second arms (3A, 3B, 4) hinged to each other at a central hinge for mutual pivoting about a hinge axis perpendicular to the first and second arms (3A, 3B, 4) and hinged to the footplate at first end portions (7A, 7B, 8) of the first and second arms (3A, 3B, 4), and comprising a base to which the first and second arms (3A, 3B, 4) are hinged at second end portions (10A, 10B, 11) of the first and second arms (3A, 3B, 4) opposite of the first end portions (7A, 7B, 8) of the first and second arms (3A, 3B, 4), wherein the first end portion of the second arm is movable along the footplate towards and away from the first end portion (7A, 7B) of the first arm (3A, 3B) and the second end portion (10A, 10B) of the first arm (3A, 3B) is movable along the base towards and away from the second end portion of the second arm; an adjustment member holding the first or second end portions (7A, 7B, 8 or 10A, 10B, 11) of the arms (3A, 3B, 4) at an adjustable distance between the first or second end portions (7A, 7B, 8 or 10A, 10B, 11) of the arms (3A, 3B, 4); and an operating member coupled to the adjustment member for disengaging the adjustment member from at least one of the first or second end portions (7A, 7B, 8) of the arms (3A, 3B, 4) and reengaging the adjustment member with the at least one of the first or second end portions (7A, 7B, 8) of the arms (3A, 3B, 4) at a position associated with a selected height setting; wherein the central hinge comprises at least a hinge body (13A, 13B) between the first and second arms (3A, 3B, 4); characterized in that at least a first one of the first and second arms (3A, 3B) has at least a protrusion or recess, the protrusion or recess of said one of the first and second arms (3A, 3B) engaging said hinge body (13A, 13B) so as to retain said hinge body (13A, 13B) positioned in longitudinal direction of said first one of the first and second arms (3A, 3B); said hinge body (13A, 13B) has a recess or protrusion on a side facing away from said first one of the first and second arms (3A, 3B); a recess or protrusion being provided on a side of the second one of said first and second arms facing said first one of the first and second arms (3A, 3B); and said recess or protrusion of said hinge body (13A, 13B) being in hinging engagement with said protrusion or, respectively, recess provided on said side of said second one of the first and second arms facing said first arm (3A, 3B). a footplate; a scissor structure comprising first and second arms (3A, 3B, 4) hinged to each other at a central hinge for mutual pivoting about a hinge axis perpendicular to the first and second arms (3A, 3B, 4) and hinged to the footplate at first end portions (7A, 7B, 8) of the first and second arms (3A, 3B, 4), and comprising a base to which the first and second arms (3A, 3B, 4) are hinged at second end portions (10A, 10B, 11) of the first and second arms (3A, 3B, 4) opposite of the first end portions (7A, 7B, 8) of the first and second arms (3A, 3B, 4), wherein the first end portion of the second arm is movable along the footplate towards and away from the first end portion (7A, 7B) of the first arm (3A, 3B) and the second end portion (10A, 10B) of the first arm (3A, 3B) is movable along the base towards and away from the second end portion of the second arm; an adjustment member holding the first or second end portions (7A, 7B, 8 or 10A, 10B, 11) of the arms (3A, 3B, 4) at an adjustable distance between the first or second end portions (7A, 7B, 8 or 10A, 10B, 11) of the arms (3A, 3B, 4); and an operating member coupled to the adjustment member for disengaging the adjustment member from at least one of the first or second end portions (7A, 7B, 8) of the arms (3A, 3B, 4) and reengaging the adjustment member with the at least one of the first or second end portions (7A, 7B, 8) of the arms (3A, 3B, 4) at a position associated with a selected height setting; wherein the central hinge comprises at least a hinge body (13A, 13B) between the first and second arms (3A, 3B, 4); characterized in that at least a first one of the first and second arms (3A, 3B) has at least a protrusion or recess, the protrusion or recess of said one of the first and second arms (3A, 3B) engaging said hinge body (13A, 13B) so as to retain said hinge body (13A, 13B) positioned in longitudinal direction of said first one of the first and second arms (3A, 3B); said hinge body (13A, 13B) has a recess or protrusion on a side facing away from said first one of the first and second arms (3A, 3B); a recess or protrusion being provided on a side of the second one of said first and second arms facing said first one of the first and second arms (3A, 3B); and said recess or protrusion of said hinge body (13A, 13B) being in hinging engagement with said protrusion or, respectively, recess provided on said side of said second one of the first and second arms facing said first arm (3A, 3B).