To provide a nesting device which can find the sorting destination of a component sheet metal from information of nesting result and which is superior in versatility.

The nesting device is provided with: a component shape data storage means 2 which stores shape data F1 of each component sheet metal (w) to be collectively nested at a time; and a sorting destination information storage means 4 which stores information F2 on the sorting destination of each component sheet metal (W). The nesting device is also provided with: a component arrangement means 5 which arranges the shape of the component sheet metal (w) with respect to the shape of the raw material sheet metal (W) according to a predetermined rule; and a sorting destination information adding means 6 which adds information on the sorting destination of each component sheet metal (w) stored in the sorting destination information storage means 4 to the component arrangement result information F3.