A work machine 1 is provided with a travel chassis in which an engine is mounted, a bonnet 11 that covers the engine and that can open and close, a shroud 154 and radiator 153 disposed inside the bonnet 11 on the side of one-side part of the engine, and shielding members 146, 147 that close a gap between the shroud 154 and the bonnet 11. The first shielding member 146 is attached to the peripheral wall of the shroud 154 covering the outer periphery of the radiator 153, and is discontinuous above a feed-water spout 142 of the radiator 153. The second shielding member 147 is attached to a bonnet 11a so as to join to the discontinuous part of the first shielding member 146 when the bonnet 11a is closed.
