Abstract: A portable GPS position measuring/displaying apparatus has a portable case, a liquid crystal display provided for the portable case, operation keys of a variety of kinds which are provided on the case, a map storage card detachably inserted in the portable case, and a multi-layered printed circuit board inserted in the portable case. The printed circuit board includes a patch type GPS antenna for receiving GPS waves from an artificial satellite, a GPS receiver made of an LSI which processes information represented by the received GPS waves so as to produce position data of an object to be measured, an operation device for calculating the position where the object to be measured is present on the basis of the position data, and display means for displaying the calculated position of the object on the screen of the liquid crystal display such that the calculated position is superimposed on map data read from the map storage card.