A dryer comprising: a cabinet; a drum rotatably provided in the cabinet; a duct that defines a flow passage for air exiting the drum; and a filter assembly located at a position relative to the flow passage and contacting air that has exited the drum, wherein the filter assembly includes: a case defining the filter assembly, a filter portion configured to filter foreign substance from the air contacting the filter assembly, a brush frame configured for rotational movement relative to the case about a rotational axis, and a brush that is supported by the brush frame and configured to separate the foreign substance from the filter portion; and a fan provided in the flow passage and configured to discharge air that has contacted the filter assembly, wherein a first distance from a first side of the case to the rotational axis of the brush frame is longer than a second distance from a second side of the case to the rotational axis of the brush frame, the first and second sides of the case are positioned at opposite horizontal ends of the case, and the rotational axis of the brush frame is horizontally offset with respect to a vertical center line of the filter portion, and the fan is positioned closer to the first side of the case than the second side of the case, characterized in that the brush frame includes a frame portion having a rod shape and a center portion at a lower side of the frame portion to form a rotation center of the frame portion, wherein the filter portion includes a filter cleaning region within which a rotary reciprocating movement of the brush frame is confined, and a foreign substance compression region configured to receive the foreign substance that has separated from the filter portion. a cabinet; a drum rotatably provided in the cabinet; a duct that defines a flow passage for air exiting the drum; and a filter assembly located at a position relative to the flow passage and contacting air that has exited the drum, wherein the filter assembly includes: a case defining the filter assembly, a filter portion configured to filter foreign substance from the air contacting the filter assembly, a brush frame configured for rotational movement relative to the case about a rotational axis, and a brush that is supported by the brush frame and configured to separate the foreign substance from the filter portion; and a fan provided in the flow passage and configured to discharge air that has contacted the filter assembly, wherein a first distance from a first side of the case to the rotational axis of the brush frame is longer than a second distance from a second side of the case to the rotational axis of the brush frame, the first and second sides of the case are positioned at opposite horizontal ends of the case, and the rotational axis of the brush frame is horizontally offset with respect to a vertical center line of the filter portion, and the fan is positioned closer to the first side of the case than the second side of the case, characterized in that the brush frame includes a frame portion having a rod shape and a center portion at a lower side of the frame portion to form a rotation center of the frame portion, wherein the filter portion includes a filter cleaning region within which a rotary reciprocating movement of the brush frame is confined, and a foreign substance compression region configured to receive the foreign substance that has separated from the filter portion. a case defining the filter assembly, a filter portion configured to filter foreign substance from the air contacting the filter assembly, a brush frame configured for rotational movement relative to the case about a rotational axis, and a brush that is supported by the brush frame and configured to separate the foreign substance from the filter portion; and a fan provided in the flow passage and configured to discharge air that has contacted the filter assembly, wherein a first distance from a first side of the case to the rotational axis of the brush frame is longer than a second distance from a second side of the case to the rotational axis of the brush frame, the first and second sides of the case are positioned at opposite horizontal ends of the case, and the rotational axis of the brush frame is horizontally offset with respect to a vertical center line of the filter portion, and the fan is positioned closer to the first side of the case than the second side of the case, characterized in that the brush frame includes a frame portion having a rod shape and a center portion at a lower side of the frame portion to form a rotation center of the frame portion, wherein the filter portion includes a filter cleaning region within which a rotary reciprocating movement of the brush frame is confined, and a foreign substance compression region configured to receive the foreign substance that has separated from the filter portion.