Abstract

An X-Y input device has: a sphere to be rotated disposed rotatably; a first driven roller in contact with the sphere so as to be rotated by the rotational force thereof; a second driven roller in contact with the sphere so as to be rotated by the rotational force thereof, and disposed so that its axial direction is substantially perpendicular to that of the first driven roller; a first rotation amount detecting means for detecting the rotation amount of the first driven roller; a second rotation amount detecting means for detecting the rotation amount of the second driven roller; and a casing for housing these sphere, first and second driven rollers, and first and second rotation amount detecting means. The casing is constituted by an upper case and a lower case. The lower case has support members for supporting respective bearing members for the first and second driven rollers. Elastically pressing members each having an end which is split into two are projected from the inner surface of the upper case and adapted to press the respective bearing members by their ends. The elastically pressing members may be molded integrally with the upper case. Moreover, the bearing members may be forced to fit into the support members, respectively.