Abstract: The invention relates to a cutting device (1) of a mobile working machine, for cutting elongated objects (2), in particular piles (2), and for being connected to a mobile working machine, comprising a first gripping member (101) and a second gripping member (102), which gripping members (101,102) are pivotal around the same pivot axis (X), said gripping members (101,102) having gripping faces (101a,102a) delimiting from opposite sides a gripping gap (G) as viewed in direction of said pivot axis (X); and moving means (103) actuatable to move the gripping members (101,102) towards and away from each other; and cutting means (104) including a cutting unit (1040) for cutting an elongated object (2) placed in the gripping gap (G); wherein the gripping face (101a,102a) of each gripping member (101,102) is shaped to have a gripping recess (R) for receiving a side of the elongated object (2) placed in the gripping gap (G), the gripping recess (R) comprising: a bottom point (C0) via which a circle (Y1) passes, which c