Disclosed is a portable navigation apparatus which positions a current position to display the position on a display section, including: an apparatus main body part in which the display section is disposed on a front side thereof; a planate GPS antenna section which is provided at an upper end of the apparatus main body part so as to be freely revolvable to receive a GPS signal transmitted from a GPS satellite; and an elevation angle adjusting mechanism which adjusts an elevation angle of the GPS antenna section, wherein the GPS antenna section is configured to switch between a state in which an entire display screen of the display section is exposed and covered, by revolving the GPS antenna section, and the GPS antenna section is freely slidable in a front and a back direction, being substantially perpendicular to the display screen of the display section.