(57) Device for the excavation and removal of material from a bottom of a water body, comprising a cutter member (9) for loosening the soil material and a discharge pipe line (7) for the loosened soil material, as well as a support structure, such as a ladder (1), for supporting the discharge pipe line (7), wherein the soil material is transported through the discharge pipe line (7) by means of a pump (15), furthermore provided with rotation means (11,12,...) for rotation of the cutter member, wherein the cutter member (9) has a number of cutting means (33) and defines a space between the cutting means and the entrance of the discharge pipe line, wherein at the entrance of the discharge pipe line a filling piece (8) is arranged, provided with a suction passage (51) between the entrance and the space in order to define a suction mouth, wherein the exit opening of the suction passage to the discharge pipe line contains the centre line (S) of the discharge pipe line and the rotary centre line of the cutter member.