Lawn mower

A lawn mower comprising:

• a vehicle body,
• a cutting unit supported by the vehicle body,
• a grass catcher mounted rearwardly of the vehicle body and including an opening in one side thereof directed to the front of the vehicle body,
• a discharge duct extending between the cutting unit and grass catcher and including an end defining a discharge opening for transmitting grass clippings from the cutting unit to the grass catcher,
• a lid member removably attached to the opening of the grass catcher and including a socket opening engageable with the end of the discharge duct and an air vent defined at least around the socket opening, and
• grass catcher posture switch means for switching the grass catcher between a sideways turned posture in which the end of the discharge duct is inserted into the grass catcher through the socket opening and an upright posture in which the socket opening is directed upwardly, said posture switch means displacing the grass catcher rearwardly prior to switching from the sideways turned posture to the upright posture, to position the end of the discharge duct outside of the grass catcher.