(57) Device for profiling ditches, consisting of a vehicle (3), a profiling cutter (4) coupled to said vehicle (3) that is provided with a bin (12) with an open end (18) and with cutter elements (13) provided opposite the open end (18) of the bin (12), further consisting of an exhaust system (30) with which the content of the bin (12) can be sucked out and collected in a reservoir (31), and which is formed of a vacuum reservoir (31) with a vacuum pump (33) and a drive (34), and whereby the vacuum reservoir (31) is connected to an opening (26) in the bin (12) by means of an exhaust pipe (35) with an exhaust mouth (37), said vacuum reservoir (31) being a mobile reservoir which is carried along by the vehicle (3), and whereby the bin (12) is provided with a partition (25) at a distance from the open end (18) of the bin (12), and with an opening (26) in the partition (25) to which the exhaust mouth (37) of the exhaust system (30) is connected in order to suck out the content of the bin (12).