Construction machine

A construction machine comprising:

• a lower traveling body;
• and
• an upper slewing body slewably mounted on the lower traveling body, the upper slewing body including:
• an upper frame as a base;
• an engine compartment provided on a rear end region of the upper frame to house an engine and an engine-related device, the engine compartment being formed with an upper opening;
• a bonnet which selectively opens and closes the upper opening;
• a cabin provided on a front region of the upper frame in one of right and left regions of the upper frame;
• a central foothold for maintenance work, the central foothold provided immediately at a front side of the engine compartment and the bonnet on a central region of the upper frame widthwise of the upper frame, the central foothold being lower than the bonnet;
• and a maintenance access passage provided on a region which is one of the right and left regions of the upper frame and is a region on an opposite side to the cabin, the maintenance access passage extending rearward while elevated to guide a worker from the ground at a front side of the upper frame to the central foothold, wherein
• the maintenance access passage has a stepped portion extending rearward and including a plurality of stair-step, the plurality of stair step including a most upper stair step which forms an upper end portion of the maintenance access passage, the plurality of the stair steps including respective most inward edges widthwise of the upper frame, the most inward edge of the most upper stair step being located inward, widthwise of the upper frame, of the most inward edge of the stair step other than the most upper stair step, and
• wherein the most inward edge of the most upper stair step is located inward, widthwise of the upper frame, of an edge which edge is one of opposite edges of the central foothold widthwise of the upper frame and which edge is closer to the maintenance access passage than the other edge, thereby aligning a part of the maintenance access passage and a part of the central foothold in a straight line extending in a front-rear direction to form a transit region between the most upper stair step of the maintenance access passage and the central foothold.