Patent ID: 7810597

Claim:
A construction machine, comprising: a lower traveling body; an upper rotating body rotatably mounted on said lower traveling body, the upper rotating body having a body frame; devices including an engine installed at a rear portion of said body frame; an openable hood provided at a rear side of said upper rotating body for covering a maintenance opening for performing maintenance work on said devices, wherein when the hood is opened, the maintenance opening is uncovered; a counterweight arranged on said rotating body below said hood, said counterweight being provided such that an upper surface side of said counterweight is covered by said hood when said hood is closed and is open when the hood is opened, wherein the counterweight is provided with a surface located rearward of the engine, further comprising a concave portion which is rearward of said surface and extending downward into the counterweight from the upper surface side of the counterweight; and a battery housed in the concave portion and located rearward of the engine, said battery being directly supported by said body frame such that the battery is not supported by the body frame via the counterweight.