A component supply device comprising: a stage configured such that components can be scattered on the stage; a slide device configured to slide the stage; a component supply apparatus having a contacting section, wherein the contacting section is configured to contact the component scattered on the stage in accordance with sliding of the stage by the slide device, wherein by operation of the slide device, the stage can be slid between an exposed state drawn out from below the component supply apparatus and a stored state, in which the stage is stored below the component supply apparatus, and the stage is arranged under the contacting section with a small clearance gap, such that the contacting section stops components scattered on the stage when the stage moves towards the stored state, the component supply device further comprising a collection container provided at an end of the stage in a direction away from the contacting section and configured to collect the components that have been contacted by the contacting section when the stage slides towards the contacting section via an opening in the collection container; and a control device configured to control operation of the slide device, wherein the control device includes a determining section configured to determine whether the stage has been slid from the exposed state to the stored state within a set time when the stage is slid towards the contacting section, and an operation control section configured to control operation of the slide device so as to, in a case in which it is determined by the determining section that the stage has not been slid to the stored state in the set time, to slide the stage in a direction away from the contacting section, and then to slide the stage again towards the contacting section. a stage configured such that components can be scattered on the stage; a slide device configured to slide the stage; a component supply apparatus having a contacting section, wherein the contacting section is configured to contact the component scattered on the stage in accordance with sliding of the stage by the slide device, wherein by operation of the slide device, the stage can be slid between an exposed state drawn out from below the component supply apparatus and a stored state, in which the stage is stored below the component supply apparatus, and the stage is arranged under the contacting section with a small clearance gap, such that the contacting section stops components scattered on the stage when the stage moves towards the stored state, wherein by operation of the slide device, the stage can be slid between an exposed state drawn out from below the component supply apparatus and a stored state, in which the stage is stored below the component supply apparatus, and the stage is arranged under the contacting section with a small clearance gap, such that the contacting section stops components scattered on the stage when the stage moves towards the stored state, the component supply device further comprising a collection container provided at an end of the stage in a direction away from the contacting section and configured to collect the components that have been contacted by the contacting section when the stage slides towards the contacting section via an opening in the collection container; and a control device configured to control operation of the slide device, wherein the control device includes a determining section configured to determine whether the stage has been slid from the exposed state to the stored state within a set time when the stage is slid towards the contacting section, and an operation control section configured to control operation of the slide device so as to, in a case in which it is determined by the determining section that the stage has not been slid to the stored state in the set time, to slide the stage in a direction away from the contacting section, and then to slide the stage again towards the contacting section.