A dehumidifier includes a water tank including an accommodating space, a connector male end assembly disposed at the water tank, a middle partition, and a connector female end disposed at the middle partition. The connector male end assembly includes a connector male end including a first end part in communication with the accommodating space and a second end part opposite to and in communication with the first end part. The connector female end includes a first connection end part connected with the second end part and a second connection end part opposite to and in communication with the first connection end part.