A needle cleaning system that backflushes an inner passage of needles (40) successively with a cleaning solution, such as caustic soda, pressurized air and a washing liquid. The needle cleaning machine has an airtight container (17) closed at the top by a support base (15) with holes (16) where a group of needles (40) are inserted in a position in which an upper portion of the needles, where an inlet opening is located, is outside the airtight container and a lower portion of the needles, where outlet ports are located, is inside the airtight container (17). The container (17) is connected to ducts (19, 21, 23, 25, 27) provided with valves (20, 24, 26, 28) by which the cleaning solution driven by a pump (29), the pressurized air (23) and the washing liquid (25) are supplied to the containers (17).
