An exhaust treatment unit treats an exhaust gas from an engine of a work vehicle. The exhaust treatment unit includes a first exhaust treatment device, a second exhaust treatment device, and a bracket. The first exhaust treatment device and the second exhaust treatment device are attached to the bracket. The bracket includes an edge part having an attachment portion configured to be attached to a vehicle body frame of the work vehicle, and a main body part having a convex shape downwardly bulged from the edge part. A bottom part of the second exhaust treatment device is positioned below the attachment portion. A work vehicle preferably includes the exhaust treatment unit, the engine and the vehicle body frame.