The present invention provides a drill (100) for a pillar, wherein the drill is capable of stably driving a pillar (700) into the ground and improving operation efficiency. The drill (100) for a pillar comprises: a drill pipe body (500) having a hammer unit (501), and a hanging protrusion (502) smaller than the inner diameter of the hollow rod (510) at the lower end thereof; and a pipe-shaped supporting pipe body (600) having one end inserted into the hollow rod (510) of the drill pipe body to be able to ascend along the hollow rod so that one end thereof comes in contact with the hammer unit while the other end thereof has a pillar setting unit (650). In particular, the pillar setting unit (650) comprises: a pillar fixing groove (651) in which one end of the pillar (700) is inserted and set; a device room (640) which is formed in an internal space region of the supporting pipe body to be adjacent to the pillar fixing groove; a first pin hole (641) which is formed to communicate with the pillar fixing groove on the wall of the device room; second pin holes (642a, 642b) which are formed in a direction perpendicular to a central axis direction of the supporting pipe body on the wall of the device room, and communicate with the outside; an elastic member which is fixed to the device room; a first pin member (644) in which one end is inserted into the first pin hole and is formed to protrude toward the pillar fixing groove side; and second pin members (645a, 645b) which are inserted into the second pin hole and have one end protruding to the outside of the second pin hole to be selectively hung on the hanging protrusion of the drill pipe body.
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