A wireless earphone, a wireless earphone box, and a wireless earphone device. The wireless earphone includes a first body and a second body. A first end face of the first body is provided with a first magnetic member. A second end face of the second body is provided with a second magnetic member. An outer surface of the second body is provided with a third contact. The second body includes a first battery. The third contact is energized to cause the first body and the second body to be in a connected state or separated state.