A push button switch, comprising: a swing rod swingably supported on a base and having a first side and a second side opposite to each other; a driver connected to the first side of the swing rod and being rotatable between a first limiting position and a second limiting position; an electrically conductive bridge having a moving contact and deflectably coupled to the second side of the swing rod; an elastic element (5, 5') coupled between the driver and the base and drivably connected with the swing rod; and a push button, configured to press the driver at one of the first limiting position and the second limiting position while being pushed, to drive the driver and the swing rod to swing around a swing axis, such that the swing rod drives the electrically conductive bridge to deflect, which causes the moving contact to contact or disengage a stationary contact; wherein the elastic element (5, 5') is configured to be driven by the swing rod to elastically deform when the push button is pushed to cause swing of the swing rod, whereas when the push button is released, the elastic element (5, 5') that is elastically deformed drives the driver to rotate from one of the first limiting position and the second limiting position to the other of the first limiting position and the second limiting position, wherein the swing rod has a first end and a second end in a direction of the swing axis, characterized in that the driver is connected to the swing rod at the first end of the swing rod, and the elastic element (5, 5') extends between the first end and the second end of the swing rod on the first side of the swing rod. a swing rod swingably supported on a base and having a first side and a second side opposite to each other; a driver connected to the first side of the swing rod and being rotatable between a first limiting position and a second limiting position; an electrically conductive bridge having a moving contact and deflectably coupled to the second side of the swing rod; an elastic element (5, 5') coupled between the driver and the base and drivably connected with the swing rod; and a push button, configured to press the driver at one of the first limiting position and the second limiting position while being pushed, to drive the driver and the swing rod to swing around a swing axis, such that the swing rod drives the electrically conductive bridge to deflect, which causes the moving contact to contact or disengage a stationary contact; wherein the elastic element (5, 5') is configured to be driven by the swing rod to elastically deform when the push button is pushed to cause swing of the swing rod, whereas when the push button is released, the elastic element (5, 5') that is elastically deformed drives the driver to rotate from one of the first limiting position and the second limiting position to the other of the first limiting position and the second limiting position, wherein the swing rod has a first end and a second end in a direction of the swing axis, characterized in that the driver is connected to the swing rod at the first end of the swing rod, and the elastic element (5, 5') extends between the first end and the second end of the swing rod on the first side of the swing rod.