Engineering tool

The present invention provides an engineering tool comprising: a basic processing unit (2) which performs processing of program editing in accordance with an input operation of an input device (11); and a display processing unit (3) which displays an operation screen for program editing on a display device (12), wherein the basic processing unit can accept input operations of a plurality of input devices as a plurality of human interfaces, if a human interface in accordance with the level of operation technique of the input operation is selected from the plurality of human interfaces, the basic processing unit performs processing of the input operation in accordance with the input device corresponding to the selected human interface, and the display processing unit displays the operation screen in accordance with the selected human interface on the display device.