A filter cleaner comprising: a housing forming an external appearance of the filter cleaner , the housing 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 to move the housing ; a gear motor configured to rotate the moving gear ; a dust container disposed so as to be introduced into or withdrawn out of the housing , the dust container being configured to store foreign substances introduced thereinto through the suction hole , wherein the dust container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 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 to operate the agitator gear ; and a suction device disposed inside the housing to induce air to flow into the dust container through the suction hole when the dust container is mounted in the housing , 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 , the agitator connection shaft is inserted into the connection recess . a housing forming an external appearance of the filter cleaner , the housing 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 to move the housing ; a gear motor configured to rotate the moving gear ; a dust container disposed so as to be introduced into or withdrawn out of the housing , the dust container being configured to store foreign substances introduced thereinto through the suction hole , wherein the dust container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 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 to operate the agitator gear ; and a suction device disposed inside the housing to induce air to flow into the dust container through the suction hole when the dust container is mounted in the housing , 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 , the agitator connection shaft is inserted into the connection recess . <EOS>