PROBLEM TO BE SOLVED: To solve problems wherein it is usually difficult to adjust the timing when a collector becomes full and when mowing operation is required to be temporarily suspended, and wherein excessive grass collection often leads to clogging of a chuter with conveyed grass and malfunction, in a mode of mowing work in which the mowing work is continued while dumping and discharging collected grass and the full state of a collector is announced by an alarm buzzer, lamp, or the like whenever the collector is full.SOLUTION: In the mower, the grass mowed in a mower deck 1 is carried and stored in the collector 3 attached to the rear of a vehicle body via a chute 2. When the collector 3 is full of the stored grass, the stored grass is dumped and discharged from a collector port 4. The mower has a grass collecting sensor 5 for giving an advance alarm before the grass stored in the collector 3 reaches a full level and for giving an alarm when the stored grass reaches the full level.COPYRIGHT: (C)2012,JPO&INPIT【課題】 コレクタが満量になる度毎に、これを警報ブザーや、ランプ等で報知して、集草芝草のダンプ排出を行いながら、刈取作業を継続する刈取作業形態にあっては、このコレクタが満量になった時と、刈取作業を一旦停止しなければならない時との、タイミングを会わせ難いことが多く、集草オーバになって、シュータの芝草搬送詰りや、故障を招くことが多い。【解決手段】 モアデッキ1部で刈取られた芝草をシュート2を経て車体後部に装着のコレクタ3に搬送収容させて、このコレクタ3の収容芝草が満量になるとダンプさせてこのコレクタ口4から排出するモアーにおいて、前記コレクタ3の収容芝草満量に達する前の満量予告時の予告警報と、この満量に達したときの満量警報を行うための集草センサ5を設ける。【選択図】 図5