Hand-push lawnmower at least having: 1.1 a housing, 1.2 two pairs (1, 2) 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 (1, 2) of wheels can be pivoted, about a respective axial pivot, into at least two different positions, wherein 1.4 the height-adjustment device has at least one coupling device, via which the axial pivots of the pairs (1, 2) 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 (1, 2) 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 of the pairs (1, 2) 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 (1, 2) 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 (1, 2) of wheels can be pivoted, about a respective axial pivot, into at least two different positions, wherein 1.4 the height-adjustment device has at least one coupling device, via which the axial pivots of the pairs (1, 2) 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 (1, 2) 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 of the pairs (1, 2) 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.