An electric lawn mower (1) includes a switch device (40) including a first switch member (41), a second switch member (42) and a main switch (43). A stopper device (41b, 42b) prevents the first switch member (41) from moving from an off-operation to an on-operation position for turning on the main switch (43) after the second switch member (42) has moved from an off-operation position to an on-operation position when the first switch member (41) is positioned at the off-operation position.
