An electric construction machine comprising: a power storage device; a motor driven by power of the power storage device; a hydraulic pump driven by the motor; a hydraulic motor for travelling and a hydraulic actuator for work that are driven by hydraulic fluid delivered from the hydraulic pump; a controller; and a display device, characterized in that the electric construction machine further includes a movement information acquiring device (39, 40; 45) configured to acquire movement information of the construction machine, and a current sensor configured to sense current consumption of the motor, the controller is configured to accumulate the current consumption of the motor sensed by the current sensor during a period from departure of the construction machine from charging equipment to arrival at a work site, based on the movement information of the construction machine acquired by the movement information acquiring device (39, 40; 45), compute an amount of consumed power and store the amount of consumed power, subtract the amount of consumed power from an amount of stored power of the power storage device to compute an amount of power consumable at the work site, compute a period of time for which operation is possible at the work site, based on the amount of power consumable at the work site, and cause the display device to display the period of time for which operation is possible at the work site. a power storage device; a motor driven by power of the power storage device; a hydraulic pump driven by the motor; a hydraulic motor for travelling and a hydraulic actuator for work that are driven by hydraulic fluid delivered from the hydraulic pump; a controller; and a display device, characterized in that the electric construction machine further includes a movement information acquiring device (39, 40; 45) configured to acquire movement information of the construction machine, and a current sensor configured to sense current consumption of the motor, a movement information acquiring device (39, 40; 45) configured to acquire movement information of the construction machine, and a current sensor configured to sense current consumption of the motor, the controller is configured to accumulate the current consumption of the motor sensed by the current sensor during a period from departure of the construction machine from charging equipment to arrival at a work site, based on the movement information of the construction machine acquired by the movement information acquiring device (39, 40; 45), compute an amount of consumed power and store the amount of consumed power, subtract the amount of consumed power from an amount of stored power of the power storage device to compute an amount of power consumable at the work site, compute a period of time for which operation is possible at the work site, based on the amount of power consumable at the work site, and cause the display device to display the period of time for which operation is possible at the work site. accumulate the current consumption of the motor sensed by the current sensor during a period from departure of the construction machine from charging equipment to arrival at a work site, based on the movement information of the construction machine acquired by the movement information acquiring device (39, 40; 45), compute an amount of consumed power and store the amount of consumed power, subtract the amount of consumed power from an amount of stored power of the power storage device to compute an amount of power consumable at the work site, compute a period of time for which operation is possible at the work site, based on the amount of power consumable at the work site, and cause the display device to display the period of time for which operation is possible at the work site.