The invention relates to the engineering machinery. The engineering machinery can make the extraction and accommodation operations of the suction filter to be easier and can prevent the damage of the suction filter. The cylinder-shaped shell (29) is provided on the work tank (11) for accommodating a suction filter (20) provided at the front end side of the suction hose (19). Therefore, the suction filter (20) can be stored in the working tank (11) together with the suction hose (19) by accommodating in the cylinder-shaped shell (29). The operator can easily extract or accommodate the suction filter (20) without colliding the surrounding relative to the cylinder-shaped shell (29), from a place on the working tank (11) at the hydraulic excavator(1) where it is easy to stretch out. Moreover, a small-diameter cylinder (30A) of the cylinder-shaped shell (29) accommodating the cylinder (30) can stably accommodate the hose connection section (21), so as to avoid the damage caused by shaking of the suction filter (20).