Trigger button and switch with trigger button

The utility model relates to a trigger button which is used for a switch (100). The trigger button comprises a shell (1) and a key cap (2). The key cap (2) can move between an initial position and a trigger position relative to the shell (1). The key cap (2) comprises a basal body (2a). The trigger button is characterized in that the key cap additionally comprises a trigger column (2b) and at least one locking column (3) which respectively extend from one side of the basal body (2a), each locking column (3) comprises a locking part, the locking part is locked onto the wall of the shell (1) when the key cap (2) is at the initial position, and the locking part is separated from the wall of the shell (1) and is guided to enter the shell and trigger the switch (100) when the key cap (2) is at the trigger position. Besides, the utility model additionally relates to the switch (100) with the trigger button.