A working machine includes a housing, a motor, an operating part, and an on-locking unit. The motor is accommodated in the housing. The operating part is a part of the housing. The operating part is movable between an on position and an off position. The motor is driven when the operating part is in the on position, and is stopped when the operating part is in the off position. The on-locking element is configured to maintain the operating part in the on position. At least a portion of the on-locking element is accommodated inside of the housing so as not to be operable when the operating part is in the off position. The portion of the on-locking unit is positioned outside of the housing such that the on-locking unit becomes operable when the operating part is in the on position.