A push button for mounting on an electronic device is disclosed. The electronic device includes a shell defining a hole, and a circuit board received in the shell. The push button includes a pressing member, a switch and a lever. The depressing member is received in the hole. The switch is received in the shell and connected to the circuit board. The switch is configured to be misaligned with the hole. The lever includes a spring arm and an body pivotally connected to the shell. When pressed, the depressing member pushes the lever to rotate from the first position to a second position where the other end of the body of the lever actuates the switch. The disclosure also provides the means of incorporating the push button into a device.