A construction machine is provided with management units (11, 12) configured to control the construction machine based on a plurality of limited power modes prescribed to control the output of a battery pack (18), and calculate an amount of electric power stored in the battery pack in each of the limited power modes based on specification information about the battery pack, on the state of charge of the battery pack, and on limited power and an operating voltage prescribed for each of the limited power modes; and a display device (14) configured to display the amount of electric power in each of the limited power modes based on the amount of electric power calculated by the management units. This allows the amount of electric power in the unselected limited power modes to be displayed and facilitates battery replacement work.