A sweeper comprising a frame, at least three wheels, a propulsion motor, a cabin for the driver, one or more brushes, each brush being able to perform a rotation relative to an armature mounted at the end of a brush holder arm that extends in front of and/or in the periphery of the cabin, as well as waste suction and collection means, wherein each brush holder arm comprises: • two pairs of profile sections, each pair comprising a top profile section and a bottom profile section, the top and bottom profile sections being: - respectively connected to the frame or to a structure connected to the frame, by a first pair of pivots (15, 16), allowing the pivoting of the profile sections relative to the frame about horizontal axes, - respectively connected to the armature of the brush, by a second pair of pivots (17, 18), allowing the pivoting of the profile sections relative to the armature about horizontal axes, such that the four pivots (15, 16, 17, 18) of each pair of profile sections form a deformable parallelogram, the two parallelograms having essentially the same dimensions and being situated in parallel vertical planes, • an actuator mounted between the pairs of profile sections, the actuator being configured to actuate the deformation of said parallelograms so as to raise or lower the brush in a vertical plane, and wherein the actuator is configured such that when the brush is raised to the maximum, the actuator is positioned below the top profile sections of said pairs of profile sections, characterized in that: • the so-called bottom pivots (16, 18) of each of the pairs of profile sections are arranged backward in a horizontal direction relative to the so-called top pivots (15 and 17), • each of the top and bottom profile sections of each pair of profile sections (11, 12) is formed by two straight parts (35, 36) secured to one another, a first part present on the side of the armature of the brush that is essentially oriented horizontally when the brush is raised to the maximum, and a second part present on the side of the frame that is inclined downward when the brush is raised to the maximum. • two pairs of profile sections, each pair comprising a top profile section and a bottom profile section, the top and bottom profile sections being: - respectively connected to the frame or to a structure connected to the frame, by a first pair of pivots (15, 16), allowing the pivoting of the profile sections relative to the frame about horizontal axes, - respectively connected to the armature of the brush, by a second pair of pivots (17, 18), allowing the pivoting of the profile sections relative to the armature about horizontal axes, such that the four pivots (15, 16, 17, 18) of each pair of profile sections form a deformable parallelogram, the two parallelograms having essentially the same dimensions and being situated in parallel vertical planes, - respectively connected to the frame or to a structure connected to the frame, by a first pair of pivots (15, 16), allowing the pivoting of the profile sections relative to the frame about horizontal axes, - respectively connected to the armature of the brush, by a second pair of pivots (17, 18), allowing the pivoting of the profile sections relative to the armature about horizontal axes, • an actuator mounted between the pairs of profile sections, the actuator being configured to actuate the deformation of said parallelograms so as to raise or lower the brush in a vertical plane, • the so-called bottom pivots (16, 18) of each of the pairs of profile sections are arranged backward in a horizontal direction relative to the so-called top pivots (15 and 17), • each of the top and bottom profile sections of each pair of profile sections (11, 12) is formed by two straight parts (35, 36) secured to one another, a first part present on the side of the armature of the brush that is essentially oriented horizontally when the brush is raised to the maximum, and a second part present on the side of the frame that is inclined downward when the brush is raised to the maximum.