The present invention provides a drilling device that can easily open a planting hole for planting a planted seedling or the like in a rough or inclined land. A rod-shaped footrest portion 5 is formed by providing a substantially inverted U-shaped connecting portion 4 at the lower end portion of a rod body 3 of a punching device A, and the axis of the instrument with the foot inserted. The body weight can be stably applied to the body, and the drilling rod body 6 can be easily inserted even on an unstable slope. By making the drilling rod detachable from the main body with a screw or the like, and replacing it with one that matches the size of the plug seedling, a plurality of types of tree planting can be performed with the same instrument. [Selection] Figure 1【課題】植林苗などを植え付ける植穴を、荒地、傾斜地に容易に開けることのできる穴あけ器を提供する。【解決手段】穴あけ器Ａの棒体３の下端部に略逆Ｕ字状の連結部４を備えることにより洋鐙型の足載せ部５を形成し、足を差し込んだ状態で器具の軸心に体重を安定してかけることができ、不安定な傾斜地でも容易に穴あけ棒体６を差し込むことができる。穴あけ棒体をネジなどで本体と着脱自在にし、プラグ苗の大きさに合わせたものと交換可能にすることで、複数種類の植林を同じ器具で行うことが可能となる。【選択図】図１
