An electric heating tool includes a body to which a power supply member is mounted. A heating device includes a power receiving connector, a seat mounted to the power receiving connector, two connection legs, and a heating element. The power receiving connector is mounted to the power supply member and has two electrodes electrically connected to two electrodes of the power supply member. Each connection leg is received in one of two through-holes of the seat and includes a connection end and a heating end. The connection ends of the connection legs are electrically connected to the electrodes of the power receiving connector. The heating element is connected to the heating ends of the connection legs.