Abstract: A construction machine including an upper revolving body capable of improving maintenance work efficiency is provided, in which when a worker carries out a plurality of maintenance operations, the worker can safely carry out the plurality of maintenance operations with a stable posture at the same location on a maintenance deck without moving to another location when the worker starts another operation after finishing one operation. The upper revolving body includes a maintenance deck that is provided on the upper center thereof, and a elevating step that is provided to ascend and descend from a side portion of the upper revolving body toward the maintenance deck, and equipment requiring maintenance is provided around the maintenance deck on the upper revolving body, and a maintenance portion of the equipment is provided in the vicinity of the maintenance deck.