Provided is a device for suctioning bodily fluids and for supplying a fluid substance to a human or animal body, in which the device includes a drive unit (1, 1′, 1″; 2) having a drive (20), a pump head (30, 30′, 30″) which is drivable by the drive (20) and a connecting part (5, 7′, 4″) which is releasably connectable to the drive unit (1, 1′, 1″; 2) and has a tube guide (555, 710′, 43″). The tube guide (555, 710′, 43″) is realized in such a manner for receiving a tube (I) that the tube, in combination with the pump head (30, 30′, 30″), forms a peristaltic pump (3) by way of which the fluid substance is conveyable through the tube (I) to the human or animal body. The pump head (30, 30′, 30″) is incorporated in the connecting part (5, 7′, 4″), and the drive unit (1, 1′, 1″; 2) includes a coupling element (24, 24′) which is connected to the drive (20) in order to couple the pump head (30, 30′. 30″) to the drive (20).