An electronic apparatus, such as an on-vehicle navigation system, is provided. The apparatus comprises a hard disc container (2) and a contacting piece (31) for grounding. The hard disc container contains a hard disc unit (7) detachably loaded thereinto. A loading/unloading passage (21) through which the hard disc unit is loaded and unloaded is formed in the container. The contacting piece is disposed in the loading/unloading passage. When the hard disc unit is loaded into the container, the hard disc unit is made to come into contact to the contacting piece before an electrical connection between the hard disc and the hard disc container is realized. Thus, even if static electricity is charged on the hard disc unit, the static electricity is grounded steadily prior to the electrical connection, thereby no harm being given to data stored by a hard disc incorporated in the hard disc unit.