A mower includes a vehicle body frame (2); a mower unit (6); a collector (14); a guide part (26, 100, 150, 211, 221) which guides the mowed lawn or grass from the mower unit (6) to the collector (14); and a collector lifting mechanism (19, 28, 29) which switches the collector (14) between a discharging position and a housing position, characterized in that the guide part (26, 100, 150, 211, 221) has a joining part (100, 211, 221) which can be joined to the collector (14), and the joining part (100, 211, 221) is located at a first position at which the joining part is joined to the collector (14) when the collector (14) is located at the housing position, and is located at a second position at which the joining part is located away from the collector (14) when the collector (14) is located at the discharging position.