A vehicular resonator for an air intake system that includes an outer pipe that constitutes the exterior thereof; and an inner pipe, a part of which is inserted into the outer pipe, and which has a slit formed therein as an air movement passage, characterised in that it further comprises: a movable pipe configured to be able to move in two opposite directions within a resonation chamber(510, 520) formed between the outer pipe and the inner pipe, said movable pipe comprising a connecting element of which one side comes into contact with an inner surface of the outer pipe and the other side comes into contact with an outer surface of the inner pipe, and which comes into contact with an elastic body to hermetically seal the resonation chamber (510, 520); and a cover element which is integrally manufactured with the connecting element and configured to surround an outer surface of the inner pipe, and encloses a part of the slit, so that as the cover element moves, a space which covers the slit changes in size to tune a continuous frequency of air; and the elastic body having one side thereof coupled to the inner pipe and the other side thereof coupled to the movable pipe, thereby providing the movable pipe with an elastic force such that the movable pipe can move; such that when a turbo-charger which operates based on preset reference revolutions per minute is installed at a front end of the resonator to compress intake air supplied from an engine, and the RPM of the turbo-charger increases compared to the reference RPM, the pressure and temperature of air introduced into the inner pipe increasing and acting on the moveable pipe, the moveable pipe moves in a direction to compress the elastic body, thereby adjusting the size of the space where air can move by covering or opening a part of the slit; and when the RPM of the turbo-charger reduces compared to the reference RPM, the moveable pipe moves in the opposite direction. a movable pipe configured to be able to move in two opposite directions within a resonation chamber(510, 520) formed between the outer pipe and the inner pipe, said movable pipe comprising a connecting element of which one side comes into contact with an inner surface of the outer pipe and the other side comes into contact with an outer surface of the inner pipe, and which comes into contact with an elastic body to hermetically seal the resonation chamber (510, 520); and a cover element which is integrally manufactured with the connecting element and configured to surround an outer surface of the inner pipe, and encloses a part of the slit, so that as the cover element moves, a space which covers the slit changes in size to tune a continuous frequency of air; and the elastic body having one side thereof coupled to the inner pipe and the other side thereof coupled to the movable pipe, thereby providing the movable pipe with an elastic force such that the movable pipe can move; such that when a turbo-charger which operates based on preset reference revolutions per minute is installed at a front end of the resonator to compress intake air supplied from an engine, and the RPM of the turbo-charger increases compared to the reference RPM, the pressure and temperature of air introduced into the inner pipe increasing and acting on the moveable pipe, the moveable pipe moves in a direction to compress the elastic body, thereby adjusting the size of the space where air can move by covering or opening a part of the slit; and when the RPM of the turbo-charger reduces compared to the reference RPM, the moveable pipe moves in the opposite direction.