Abstract: A stage apparatus comprises a fixed base, a movable table, a pair of elastic portions arranged in both sides of the table along an X axis, a pair of elastic portions arranged in both sides of the table along a Y axis, a pair of actuators for generating displacements for moving the table in a Y direction, a pair of displacement amplifying mechanisms for amplifying displacements of the actuators, a pair of actuators for generating displacements for moving the table in an X direction, and a pair of displacement amplifying mechanisms for amplifying displacements of the actuators.