1. An inspection standard setting device to set inspection standards to be used at a process inspection for a plurality of inspection items on a production line which executes the process inspection determining pass or fail of an intermediate product by comparing a feature extracted from the intermediate product with a predetermined inspection standard, and a final inspection determining pass or fail of a completed product at a final process, comprising: a memory device for storing an extracted feature of each inspection item at the process inspection and a determination result at the final inspection; a separation degree calculation unit for calculating a separation degree showing how much the product determined to be good and the product determined to be defective at the final inspection are separated in a distribution of the extracted feature for every inspection item or every combination of the inspection items of the process inspection based on data of a plurality of products stored in the memory device; a target item selection unit for selecting an inspection item whose inspection standard is to be reset from the inspection items or the combinations of the inspection items based on a value of the separation degree; and an inspection standard setting unit for setting a new inspection standard for the selected inspection item.