An electric lawn mower (1) includes a mower body (10) having a battery mount device (20) configured to be able to hold a battery (21). The electric mower further includes an unauthorized use preventing device (30, 31) for preventing the unauthorized use of the electric lawn mower (1). The unauthorized use preventing device (30, 31) includes a key (30) and a key receiver (31). The key receiver (31) is disposed at the mower body (10) at a position proximal to the battery mount device (20) or the battery (21).
