A work machine, comprising: a vehicle body frame of the work machine; an engine mounted on the vehicle body frame; an engine cover covering the top of the engine and fixed to the vehicle body frame via a column; a first exhausting device which is an oxidation catalyst having a housing of tubular appearance and an inlet and an outlet, the outlet being provided in the external circumference surface of the housing in the vicinity of one end of the tubular housing; and a bracket having a first holding part (511, 512) for holding the first exhausting device, characterized in that the inlet is provided at one end wall of the housing at the other end of the tubular housing opposing the one end having the outlet in its vicinity, the work machine has a second exhausting device which is a muffling device or an urea selective catalytic reduction device having a tubular appearance; the first holding part (511, 512) of the bracket is an upper holding part, and the bracket has a second lower holding part for holding the second exhausting device and comprises attachment seats for attaching the bracket together with the first exhausting device and the second exhausting device to a lower surface of the engine cover, wherein: the bracket is designed such as to integrally hold the first and second exhausting devices (410, 420) in such a manner that an extending direction of the first exhausting device and an extending direction of the second exhausting device are generally parallel, seen from above, and a part of the first exhausting device and a part of the second exhausting device overlap each other, seen from above, while fixing the first and second exhausting devices (410, 420) below the engine cover. a vehicle body frame of the work machine; an engine mounted on the vehicle body frame; an engine cover covering the top of the engine and fixed to the vehicle body frame via a column; a first exhausting device which is an oxidation catalyst having a housing of tubular appearance and an inlet and an outlet, the outlet being provided in the external circumference surface of the housing in the vicinity of one end of the tubular housing; and a bracket having a first holding part (511, 512) for holding the first exhausting device, characterized in that the inlet is provided at one end wall of the housing at the other end of the tubular housing opposing the one end having the outlet in its vicinity, the work machine has a second exhausting device which is a muffling device or an urea selective catalytic reduction device having a tubular appearance; the first holding part (511, 512) of the bracket is an upper holding part, and the bracket has a second lower holding part for holding the second exhausting device and comprises attachment seats for attaching the bracket together with the first exhausting device and the second exhausting device to a lower surface of the engine cover, wherein: the bracket is designed such as to integrally hold the first and second exhausting devices (410, 420) in such a manner that an extending direction of the first exhausting device and an extending direction of the second exhausting device are generally parallel, seen from above, and a part of the first exhausting device and a part of the second exhausting device overlap each other, seen from above, while fixing the first and second exhausting devices (410, 420) below the engine cover. an extending direction of the first exhausting device and an extending direction of the second exhausting device are generally parallel, seen from above, and a part of the first exhausting device and a part of the second exhausting device overlap each other, seen from above, while fixing the first and second exhausting devices (410, 420) below the engine cover.