In a drip irrigation pipe (4), the dosing elements (1) used therein, which are connected to the wall (9) of the drip irrigation pipe (4), respectively have inlet regions (2), metering regions (5) and outlet regions (6), through which the Water exits through the pipe wall (9) outlet openings (7) from the drip irrigation pipe (4). The outlet openings (7) have the shape of a slot (8), the edge regions (12) of the slots (8) are supported by support means (10) such that a bending of the edge regions (12) of the slot (8) against the metering (1) is limited. This avoids that under prevailing negative pressure in the pipe impurities through the slots (8) can penetrate into the metering and clog these.
