DRILLING DEVICE

To provide a drilling device which can prevent deterioration of position accuracy of drilling.SOLUTION: A drilling device (1) includes: an installation base having a drill part which performs drilling to a workpiece (W), and a discharge chamber (43) which is disposed at the opposite side of the drill part with respect to an installation surface (42s) on which the workpiece (W) is installed and to which powder dust occurring when drilling is performed by the drill part is discharged; a dust collector (20) which suctions powder dust in the discharge chamber (43) to collect the powder dust; and an air inflow valve (70) which is connected to the discharge chamber (43) and may switch a state of the drilling device (1) between an inflow state where air flows into the discharge chamber (43) and a blocking state in which the inflow of air into the discharge chamber (43) is blocked.SELECTED DRAWING: Figure 2 【課題】穴明け加工の位置精度が低下することの防止を図ることが可能な穴明け装置を提供すること。【解決手段】穴明け装置（１）は、ワーク（Ｗ）を穴明け加工する穴明け部と、ワーク（Ｗ）を設置する設置面（４２ｓ）に対して穴明け部の反対側に配置され、穴明け部により穴明け加工された際の粉塵が排出される排出室（４３）を有する設置台と、排出室（４３）の粉塵を吸引して集塵する集塵機（２０）と、排出室（４３）に接続され、排出室（４３）に空気を流入する流入状態と排出室に対して空気の流入を遮断する遮断状態とに切換え可能な空気流入弁（７０）と、を備えた。【選択図】図２