A laundry treating apparatus, comprising: a laundry accommodation device (2, 3) that provides a space in which laundry is accommodated, the laundry accommodation device (2, 3) having an exhaust device that exhausts air and a supply device that supplies air; a circulation passage (51, 53, 55) that guides air exhausted from the exhaust device to the supply device, the circulation passage (51, 53, 55) having an inlet that accommodates the exhaust device; a heat exchanger provided in the circulation passage; a filter frame provided between the heat exchanger and the inlet; a filter fixed to the filter frame and provided in the circulation passage; and a filter washer fixed to the filter frame, that supplies washing water to the filter, wherein the filter frame comprises: a body provided in the circulation passage; and an open surface provided to pass through the body, wherein the filter is fixed to the open surface, and characterized in that the filter washer is fixed to the body and comprises: a passage body that receives washing water thereinto, and provided above the open surface; one or more discharge holes that discharge the washing water inside of the passage body to the filter, and formed at the passage body; and a connection body exposed to an outside of the circulation passage by passing through the circulation passage and connected to a water source so as to supply the washing water to the passage body. a laundry accommodation device (2, 3) that provides a space in which laundry is accommodated, the laundry accommodation device (2, 3) having an exhaust device that exhausts air and a supply device that supplies air; a circulation passage (51, 53, 55) that guides air exhausted from the exhaust device to the supply device, the circulation passage (51, 53, 55) having an inlet that accommodates the exhaust device; a heat exchanger provided in the circulation passage; a filter frame provided between the heat exchanger and the inlet; a filter fixed to the filter frame and provided in the circulation passage; and a filter washer fixed to the filter frame, that supplies washing water to the filter, wherein the filter frame comprises: a body provided in the circulation passage; and an open surface provided to pass through the body, wherein the filter is fixed to the open surface, and characterized in that the filter washer is fixed to the body and comprises: a passage body that receives washing water thereinto, and provided above the open surface; one or more discharge holes that discharge the washing water inside of the passage body to the filter, and formed at the passage body; and a connection body exposed to an outside of the circulation passage by passing through the circulation passage and connected to a water source so as to supply the washing water to the passage body. a body provided in the circulation passage; and an open surface provided to pass through the body, wherein the filter is fixed to the open surface, and characterized in that the filter washer is fixed to the body and comprises: a passage body that receives washing water thereinto, and provided above the open surface; one or more discharge holes that discharge the washing water inside of the passage body to the filter, and formed at the passage body; and a connection body exposed to an outside of the circulation passage by passing through the circulation passage and connected to a water source so as to supply the washing water to the passage body. a passage body that receives washing water thereinto, and provided above the open surface; one or more discharge holes that discharge the washing water inside of the passage body to the filter, and formed at the passage body; and a connection body exposed to an outside of the circulation passage by passing through the circulation passage and connected to a water source so as to supply the washing water to the passage body.