A movable contact body includes a separator (13), a number of domes (12), an insulative film (11) and a shielding (10). The separator is made of insulative material and is substantially a planar sheet. The domes are made of resilient conductive material and are located on the separator in pre-determined locations. The insulative film coats on upper surfaces of the domes. The planar shielding is made of conductive material and coats on the insulative film. The planar shielding defines a number of openings (100) in predetermined locations corresponding to the domes. Each opening receives one dome therein.