AIRLESS DISPENSER WITH APPLICATOR NOZZLE FOR FLEXIBLE PACKAGING, comprising: - a vertical outlet chamber hermetically controlled by two blocks in its ends, one lower block in the form of a plug in the lower end and one upper block in the form of an elastomeric valve in the upper end of the vertical outlet chamber - the vertical outlet chamber being defined by a hollow part of a cylindrical lower capsule, and an applicator nozzle with an internal elastomeric mass located inside said the applicator nozzle; - the lower capsule has a sealing seat to drive the plug, so that between it and the lower capsule a passage is formed which can be opened or closed for the output or water tightness of the product; - the plug is kept lightly pressed against the sealing seat through an elastic pad; - the lower capsule and the applicator nozzle are coupled by means of respective flexible part of the lower capsule and flexible part of the applicator nozzle, coupling together to a nozzle of a flexible container; - the flexible container suitable to be pressed and is made of a flexible plastic material with memory to return to its original shape and to cause suction inside; - the plug is housed in the sealing seat with enough clearance to be moved up and down when internal pressure occurs or ceases inside the flexible container and allows the product to pass through the sealing seat or close it tightly; - the elastic pad having enough elasticity to be compressed concomitantly with the displacement of the plug when there is internal pressure in the container; - the elastomeric valve has an elastic opening point designed to be in open and closed position when there is pressure and when the pressure inside the flexible container is interrupted; and - the plug, the elastomeric valve and the elastic pad return to the watertight closed position when the flexible container is no longer pressed, and its flexible memory tries to return to its original state. - a vertical outlet chamber hermetically controlled by two blocks in its ends, one lower block in the form of a plug in the lower end and one upper block in the form of an elastomeric valve in the upper end of the vertical outlet chamber - the vertical outlet chamber being defined by a hollow part of a cylindrical lower capsule, and an applicator nozzle with an internal elastomeric mass located inside said the applicator nozzle; - the lower capsule has a sealing seat to drive the plug, so that between it and the lower capsule a passage is formed which can be opened or closed for the output or water tightness of the product; - the plug is kept lightly pressed against the sealing seat through an elastic pad; - the lower capsule and the applicator nozzle are coupled by means of respective flexible part of the lower capsule and flexible part of the applicator nozzle, coupling together to a nozzle of a flexible container; - the flexible container suitable to be pressed and is made of a flexible plastic material with memory to return to its original shape and to cause suction inside; - the plug is housed in the sealing seat with enough clearance to be moved up and down when internal pressure occurs or ceases inside the flexible container and allows the product to pass through the sealing seat or close it tightly; - the elastic pad having enough elasticity to be compressed concomitantly with the displacement of the plug when there is internal pressure in the container; - the elastomeric valve has an elastic opening point designed to be in open and closed position when there is pressure and when the pressure inside the flexible container is interrupted; and - the plug, the elastomeric valve and the elastic pad return to the watertight closed position when the flexible container is no longer pressed, and its flexible memory tries to return to its original state.