PROBLEM TO BE SOLVED: To eliminate such a problem that the shape of a hole in a kitchen counter does not match the shape of an opening part in a sink.;SOLUTION: This kitchen counter machining device 30 for machining a kitchen counter (counter) having the sink installed in the hole thereof by aligning the opening part in the sink (tank body) with the hole formed in the kitchen counter comprises a cutting mechanism capable of cutting the edge part of the hole in the kitchen counter having the sink installed therein, a positioning mechanism for positioning the cutting mechanism by bringing a guide member 35 into contact with the inside surface of the opening part, and a moving mechanism for moving the positioned cutting mechanism along the edge part of the opening part. Since the cutting mechanism is moved along the edge part of the opening part in the sink while being positioned according to the inside face of the opening part in the sink, the edge part of the hole in the kitchen counter is cut according to the inside face of the opening part, and the shape of the hole in the kitchen counter matches the shape of the opening part in the sink.;COPYRIGHT: (C)2002,JPO
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