The present invention discloses a steam iron which includes an iron body, a steam generation device disposed in the iron body, and an operation sensing device electrically connected to steam generation device. Compared with the existing technologies, in the present invention, an additional operation sensing device is electrically connected to the steam generation device. When the user operates the steam iron, the operation sensing device can transmits operating signals to the steam generation device which thus starts to work. When the iron is not operated, the steam generation device doesn't work because no operating signal is transmitted to the operation sensing device, thereby reducing energy and enhancing safety.