A dehumidifier is provided that may include a bucket; a drain pan including a drain passage configured to guide condensed water dropped from an evaporator to the bucket; a pump; a pump water inlet line connected to the pump, the pump water inlet line being configured to guide the condensed water in the bucket to the pump; a pump water outlet line connected to the pump, the pump water outlet line being provided with an outlet installed in the drain passage or disposed above the bucket, and an outer tube connected to the pump water outlet line in the drain passage or above the bucket.