The present invention relates to an axial piston mechanism (1) which is provided with a sloping plate structure and comprises the following components: a first pivoting supporting component (13b) which is supported on the casing; and a second pivoting supporting component (13c) which is arranged on the first pivoting supporting component (13b) pivotly around the pivoting axis (13a) thereby forming the sloping plate (12); the pivoting supporting components (13b and 13c) include the arc-shaped bending supporting surface (13d and 13e) at the two sides opposite to each other, a gap (14) is arranged between the supporting surfaces and in the gap the holder part (15) and a plurality of rolling elements (13f) are also pivotly arranged around the pivoting axis, the holder part (15) is guided by the elongated guiding element (19) which extends transverse to the gap (14) and projects from the gap (14), the elongated directing element (19) is provided with a smooth guiding head (19c) at one end and is pivotly arranged in the sliding guiding element (24) with the smooth guiding head (19c), the sliding guiding element (24) is arranged on one of the two pivoting supporting components (13b and 13c) or arranged on the assembly of the two components, besides, the guiding element (19) accordingly is povotly connected with the holder part (15) and the other pivoting supporting component (13c) bythe rotating supporting components (21 and 22). To improve the guiding of the holder part (15) the guiding element (19) is movably connected with the holder part (15) along the longitudinal directionwith the elongated guiding element (23) in the area of the rotating supporting component (22) connected to the holder part (15), and is connected to the other pivoting supporting component (13c) in the end area which can rotate with the correlative rotating supporting piece (21) and is rigidly connected with the other pivoting supporting component (13c) along the longitudinal direction.