A dehumidifier is provided. The dehumidifier includes a main body having a suction part into which air is suctioned, the main body having a discharge part through which the air is discharged, a compressor disposed in the main body to compress a refrigerant, a second heat-exchange part receiving the compressed refrigerant from the compressor, and first and third heat-exchange parts disposed in the main body to receive the refrigerant condensed by the second heat-exchange part. The air suctioned through the suction part successively passes through the first, second, and third heat-exchange parts.