Heavy equipment having a tool box opening in forward direction of the equipment is provided, in which a tool box door (13) mounted on an upper frame (2) of an excavator can be simply opened and closed through pressing of a button (19) , an auxiliary structure, such as a handrail (16) that is used when an operator ascent toward an engine room, is not required, and the shape of the tool box door (13) can be freely designed to sufficiently secure storage space (18). The heavy equipment includes a lower driving structure (1); an upper frame mounted on the lower driving structure (1) to be swiveled; a cab (3) and an engine room (4) mounted in front and in the rear of the upper frame (2); working devices (5,6) including a boom (5) fixed to the upper frame (2), an arm (6), a bucket (7), and hydraulic cylinders (8,9,10) for driving the boom (5), the arm (6), and the bucket (7), respectively; a counter weight (12) mounted in the rear of the upper frame (2) to keep the balance of the equipment during working; a tool bo
