the present invention provides a portable information terminal with fewer differences between models in a parts configuration even when manufacturing a plurality of models with different detectors . the portable information terminal includes an upper cover section and a main body and the upper cover section is provided with a digitizer detecting , when a position on a display screen is pointed , the position and outputting a position signal and a conversion board that converts the position signal output from the digitizer through analog signal lines to a predetermined digital signal and inputs the signal to the main body .