A push switch of the invention comprises a switching-element assembly (100) and an actuator assembly (1a) arranged on the switching-element assembly, wherein the switching-element assembly comprises first and second contacts(110a, 110b), the second contact being arranged over and elastically movable towards the first contact and making contact with the first contact when depressed by the actuator assembly. The basic type of actuator assembly includes an airtight enclosure formed by a domed-shaped elastic film and containing a gas, whereby a bottom surface (12) of the airtight enclosure depresses said second contact when the top surface (11) is pressed down. Several modified types of actuator assembly are also disclosed.