PROBLEM TO BE SOLVED: To provide a handle locking device of a lawn-mower in which a tightening amount between a bolt-shaped member and a nut-shaped member can be made constant.SOLUTION: An electric lawn-mower includes a first handle member 30 provided in a lawn-mower body and a second handle member 32 connected to the first handle member 30 in a foldable and expandable manner. A handle locking device 36 includes a bolt-shaped member 53 and a nut-shaped member 55 for turnably connecting both handle members 30,32, and a lever-shaped member 57 turnably connected to the nut-shaped member 55 through a spring pin 74. A fixed state for tightening and holding both handle members 30, 32, and a locking release state for releasing the holding, are switched between the bolt-shaped member 53 and the lever-shaped member 57, by the turning operation of the lever-shaped member 57. The spring pin 74 defines a tightening amount between the bolt-shaped member 53 and the nut-shaped member 55 in a predetermined amount.COPYRIGHT: (C)2015,JPO&INPIT【課題】ボルト状部材とナット状部材との間の締付け量を一定化することのできる芝刈機のハンドル固定装置を提供する。【解決手段】電動芝刈機は、芝刈機本体に設けた第1のハンドル部材30と、第1のハンドル部材30に対して折畳み及び展開可能に連結した第2のハンドル部材32とを備える。ハンドル固定装置36は、両ハンドル部材30,32を回動可能に連結するボルト状部材53及びナット状部材55と、ナット状部材55にスプリングピン74を介して回動可能に連結されたレバー状部材57とを備える。レバー状部材57の回動操作により、ボルト状部材53とレバー状部材57との間に両ハンドル部材30,32を締付けて挟持する固定状態とその挟持を解除する固定解除状態とに切替える。スプリングピン74はボルト状部材53とナット状部材55との間の締付け量を所定量に規定する。【選択図】図4