A filter cleaner comprising: a housing (302, 330) forming an external appearance of the filter cleaner, the housing (302, 330) having a suction hole formed in one side thereof and a discharge hole formed in another side thereof; a moving gear rotatably disposed in the housing (302, 330) to move the housing (302, 330); a gear motor configured to rotate the moving gear; a dust container disposed so as to be introduced into or withdrawn out of the housing (302, 330), the dust container being configured to store foreign substances introduced thereinto through the suction hole, wherein the dust container comprises a dust container housing having formed therein a storage space in which foreign substances removed from a filter are stored, an agitator space and an agitator rotatably disposed in the agitator space and configured to remove foreign substances from the filter by contacting the same; an agitator gear disposed inside the housing (302, 330) to rotate the agitator; an agitator connection shaft configured to transmit a rotational force of the agitator gear to the agitator; an agitator motor disposed inside the housing (302, 330) to operate the agitator gear; and a suction device disposed inside the housing (302, 330) to induce air to flow into the dust container through the suction hole when the dust container is mounted in the housing (302, 330), wherein the agitator gear is fixedly disposed on a circumference of the agitator connection shaft so as to rotate together with the agitator connection shaft, wherein the agitator has a connection recess formed therein to allow the agitator connection shaft to be inserted thereinto, and wherein, when the dust container is mounted in the housing (302, 330), the agitator connection shaft is inserted into the connection recess. a housing (302, 330) forming an external appearance of the filter cleaner, the housing (302, 330) having a suction hole formed in one side thereof and a discharge hole formed in another side thereof; a moving gear rotatably disposed in the housing (302, 330) to move the housing (302, 330); a gear motor configured to rotate the moving gear; a dust container disposed so as to be introduced into or withdrawn out of the housing (302, 330), the dust container being configured to store foreign substances introduced thereinto through the suction hole, wherein the dust container comprises a dust container housing having formed therein a storage space in which foreign substances removed from a filter are stored, an agitator space and an agitator rotatably disposed in the agitator space and configured to remove foreign substances from the filter by contacting the same; an agitator gear disposed inside the housing (302, 330) to rotate the agitator; an agitator connection shaft configured to transmit a rotational force of the agitator gear to the agitator; an agitator motor disposed inside the housing (302, 330) to operate the agitator gear; and a suction device disposed inside the housing (302, 330) to induce air to flow into the dust container through the suction hole when the dust container is mounted in the housing (302, 330), wherein the agitator gear is fixedly disposed on a circumference of the agitator connection shaft so as to rotate together with the agitator connection shaft, wherein the agitator has a connection recess formed therein to allow the agitator connection shaft to be inserted thereinto, and wherein, when the dust container is mounted in the housing (302, 330), the agitator connection shaft is inserted into the connection recess.