To provide a chopper attachment being an accessory of a food processing blender and efficiently and uniformly chopping cooking items such as vegetables.

The chopping attachment includes a container base 3 attachable/detachable relative to a blender body 2 having a driving shaft driven by a motor, and a chopper container 4 detachably attached to the top of the container base 3 and having a substantially cup shape. The container base 3 is rotatably provided with a chopper blade 9 connected to the driving shaft by being mounted to the blender body 2, and a bottom portion 4c of the chopper container 4 is provided with a projection member 14 projecting toward the chopper blade 9 and having a substantially columnar shape in appearance, coaxially with the axis of the chopper blade 9.