A clothes treatment apparatus comprising: a cabinet forming a treatment space for storing clothes; a filter module having a filter portion for filtering out dust from air passing therethrough; an air flow path having a plurality of preset flow paths for directing air to be discharged into the treatment space, wherein the plurality of flow paths comprises at least one bypass flow path (Pa) for directing the air to bypass the filter portion, at least one filtering flow path (Pb, Pc) for directing the air to pass through the filter portion, and a shared section which commonly constitutes part of the bypass flow path (Pa) and part of the filtering flow path (Pb, Pc); a fan for moving the air in the air flow path; a single valve disposed on the air flow path, that changes the air flow path by rotating around a predetermined rotational axis (Ov); a valve actuating module for rotating the valve; and a control part for controlling the angle of rotation of the valve so as to select one of the plurality of flow paths; wherein the air flow path comprises an inner inlet section through which the air in the treatment space is admitted, a filter bypass section in which the air bypasses the filter portion, and a filter pass-through section in which the air passes through the filter portion, wherein the filter pass-through section and the filter bypass section are connected and branch off at a downstream end of the inner inlet section; wherein the at least one bypass flow path (Pa) comprises a bypass circulation flow path which is selected when the valve connects the inner inlet section and the filter bypass section, and the at least one filtering flow path (Pb) comprises a filtering circulation flow path which is selected when the valve connects the inner inlet section and the filter pass-through section; and wherein the at least one filtering flow path (Pb, Pc) further comprises a ventilation flow path (Pc) for directing air drawn in from an outer space (Ou) of the cabinet to pass through the filter portion. a cabinet forming a treatment space for storing clothes; a filter module having a filter portion for filtering out dust from air passing therethrough; an air flow path having a plurality of preset flow paths for directing air to be discharged into the treatment space, wherein the plurality of flow paths comprises at least one bypass flow path (Pa) for directing the air to bypass the filter portion, at least one filtering flow path (Pb, Pc) for directing the air to pass through the filter portion, and a shared section which commonly constitutes part of the bypass flow path (Pa) and part of the filtering flow path (Pb, Pc); a fan for moving the air in the air flow path; a single valve disposed on the air flow path, that changes the air flow path by rotating around a predetermined rotational axis (Ov); a valve actuating module for rotating the valve; and a control part for controlling the angle of rotation of the valve so as to select one of the plurality of flow paths; wherein the air flow path comprises an inner inlet section through which the air in the treatment space is admitted, a filter bypass section in which the air bypasses the filter portion, and a filter pass-through section in which the air passes through the filter portion, wherein the filter pass-through section and the filter bypass section are connected and branch off at a downstream end of the inner inlet section; wherein the at least one bypass flow path (Pa) comprises a bypass circulation flow path which is selected when the valve connects the inner inlet section and the filter bypass section, and the at least one filtering flow path (Pb) comprises a filtering circulation flow path which is selected when the valve connects the inner inlet section and the filter pass-through section; and wherein the at least one filtering flow path (Pb, Pc) further comprises a ventilation flow path (Pc) for directing air drawn in from an outer space (Ou) of the cabinet to pass through the filter portion.