A driving apparatus 1 of an electric construction machine including a lower traveling body 101, an upper rotating body 102 that is attached to the lower traveling body 101, a boom 104 attached to the upper rotating body 102, an arm 105 that is attached to the boom 104, and a bucket 106 that is attached to the arm 105, includes: a battery 10 that generates DC power, DC/AC converters 121 and 131 that convert the DC power generated by the battery 10 into AC power, a contactless transmission unit 122 to 124, and 132 that contactlessly transmit the AC power converted by the DC/AC converters 121 and 131 in joint components of the electric construction machine, and an actuator 2 that drives the joint component based on the AC power transmitted from the contactless transmission unit 122 to 124, and 132.