Disc brake. in particular disc brake actuable by means of a piston rod of a pneumatically or electromotively operated brake cylinder, with a brake calliper, which preferably encompasses an edge region of a brake disc on which at least one brake pad (4, 4d) is located on both sides, wherein the brake calliper accommodates an application device in an opening on an application side of the brake disc, the disc brake having at least the following features: a) an inside rotary lever, i.e. located in the interior of the brake calliper, which preferably has a lever axis oriented parallel to the brake disc; b) at least one rolling body application unit, which has a spindle axis and at least one application piston movable at right angles to the brake disc and designed to overcome the working stroke or to apply the application-side application piston with the brake pad to the brake disc as a result of a pivoting of the rotary lever in braking operations, wherein the at least one rolling body application unit comprises a ball ramp unit with a ramp drive disc, ramp balls and a ramp reaction disc, c) wherein a drive connection between the rotary lever and the at least one rolling body application unit is designed as a coupling mechanism with at least one rounded coupling element, d) wherein the coupling mechanism comprises a roll-off contour with a contour surface located on a coupling section of the ramp drive disc, e) wherein the at least one rounded coupling element of the coupling mechanism between the rotary lever and the one or the two or more rolling body application units is at least one ball, hemisphere, part-ball or coupling bar, characterised in that f) the roll-off contour with the contour surface is a groove-shaped moulding and has a curvature in a plane perpendicular to the axis of rotation of the ramp drive disc, and in that g) the rotary lever is guided axially in the direction (R9a) of its lever axis, about which the rotary lever is pivotable, via the at least one ball, hemisphere, part-ball or coupling bar of the coupling mechanism in the roll-off contour with the contour surface in the coupling section of the ramp drive disc. a) an inside rotary lever, i.e. located in the interior of the brake calliper, which preferably has a lever axis oriented parallel to the brake disc; b) at least one rolling body application unit, which has a spindle axis and at least one application piston movable at right angles to the brake disc and designed to overcome the working stroke or to apply the application-side application piston with the brake pad to the brake disc as a result of a pivoting of the rotary lever in braking operations, wherein the at least one rolling body application unit comprises a ball ramp unit with a ramp drive disc, ramp balls and a ramp reaction disc, c) wherein a drive connection between the rotary lever and the at least one rolling body application unit is designed as a coupling mechanism with at least one rounded coupling element, d) wherein the coupling mechanism comprises a roll-off contour with a contour surface located on a coupling section of the ramp drive disc, e) wherein the at least one rounded coupling element of the coupling mechanism between the rotary lever and the one or the two or more rolling body application units is at least one ball, hemisphere, part-ball or coupling bar, characterised in that f) the roll-off contour with the contour surface is a groove-shaped moulding and has a curvature in a plane perpendicular to the axis of rotation of the ramp drive disc, and in that g) the rotary lever is guided axially in the direction (R9a) of its lever axis, about which the rotary lever is pivotable, via the at least one ball, hemisphere, part-ball or coupling bar of the coupling mechanism in the roll-off contour with the contour surface in the coupling section of the ramp drive disc.