The invention provides a charging device which comprises a base and a converting part. The base comprises a connecting part, so that the converting part is placed. The connecting part comprises a protrusion, so that a containing cavity is formed. The bottom of the protrusion and the bottom of the containing cavity are the positive electrode and the negative electrode of the base respectively. The converting part comprises a positive electrode and a negative electrode which are placed in the containing cavity. The positive electrode and the negative electrode of the converting part are in electric contact with the positive electrode and the negative electrode of the base. The converting part further comprises a contact part which is electrically connected with the positive electrode or the negative electrode, so that the converting part is electrically connected with a balance electric vehicle. According to the charging device, the weight of the balance electric vehicle is pressed on the converting part during charging, communication of a charging circuit is guaranteed, and meanwhile no matter how the balance electric vehicle is placed, how the direction changes, charging can be achieved through the converting part, even if the balance electric vehicle is bumped, outage cannot happen, the problem of wire winding is avoided, and meanwhile the charging device can be used as a parking device, and cost is saved.