Hand-push lawnmower at least having: 1.1 a housing, 1.2 two pairs of wheels, which are mounted pivotably on the housing, and 1.3 a height-adjustment device , which is intended for adjusting the cutting height of a mowing unit of the lawnmower and by means of which the pairs of wheels can be pivoted, about a respective axial pivot (S), into at least two different positions, wherein 1.4 the height-adjustment device has at least one coupling device , via which the axial pivots (S) of the pairs of wheels are coupled to one another, 1.5 an actuating device for the height-adjustment device , the actuating device being mounted in a movable manner on the housing, and 1.6 the actuating device has a guide-track unit , in which an arresting element, which is connected rigidly to the coupling device , engages in different positions so that, in each position of the arresting element, a different position of the pairs of wheels and a different cutting height are adjusted, wherein 1.7 the coupling device has at least one connecting rod , which connects the axial pivots (S) of the pairs of wheels to one another in an articulated manner, and 1.8 the arresting element is a stub , which is arranged on the at least one connecting rod and engages in the tooth interspaces of a toothed-ring portion of the guide-track unit , characterized in that 1.9 the actuating device has a manually actuable pressure-exerting element, which can be moved in translatory fashion in order to disengage the guide-track unit from the stub , wherein 1.10 the pressure-exerting element is mounted in an immovable manner relative to the guide-track unit , so that actuation of the pressure-exerting element causes the guide-track unit to be pushed down, while the stub remains rigidly in position and does not move. 1.1 a housing, 1.2 two pairs of wheels, which are mounted pivotably on the housing, and 1.3 a height-adjustment device , which is intended for adjusting the cutting height of a mowing unit of the lawnmower and by means of which the pairs of wheels can be pivoted, about a respective axial pivot (S), into at least two different positions, wherein 1.4 the height-adjustment device has at least one coupling device , via which the axial pivots (S) of the pairs of wheels are coupled to one another, 1.5 an actuating device for the height-adjustment device , the actuating device being mounted in a movable manner on the housing, and 1.6 the actuating device has a guide-track unit , in which an arresting element, which is connected rigidly to the coupling device , engages in different positions so that, in each position of the arresting element, a different position of the pairs of wheels and a different cutting height are adjusted, wherein 1.7 the coupling device has at least one connecting rod , which connects the axial pivots (S) of the pairs of wheels to one another in an articulated manner, and 1.8 the arresting element is a stub , which is arranged on the at least one connecting rod and engages in the tooth interspaces of a toothed-ring portion of the guide-track unit , characterized in that 1.9 the actuating device has a manually actuable pressure-exerting element, which can be moved in translatory fashion in order to disengage the guide-track unit from the stub , wherein 1.10 the pressure-exerting element is mounted in an immovable manner relative to the guide-track unit , so that actuation of the pressure-exerting element causes the guide-track unit to be pushed down, while the stub remains rigidly in position and does not move. <EOS>