To safely pull out an earth measuring terminal from a concrete column with high work efficiency.

A grip 110 formed of a pipe member of a square cylinder shape, and an operating part 120 formed of two plate-like members 122a, 122b are connected in a L-shape. The tip side of the operating part 120 is formed with a locking part 121 locked to a step bolt 310 fitted to the earth measuring terminal 210. When the grip 110 is tilted around a connection part of the grip 110 and operating part 120 as a fulcrum, the operating part 120 moves in the pull-out direction of the earth measuring terminal 210 by the principle of a lever. At this time, since the earth measuring terminal 210 is pulled in the pull-out direction through the step bolt 310, the earth measuring terminal 210 is pulled out of the concrete column 210. An escape recess 123 is formed at the operating part 120 to prevent the contact of the pulled-out earth measuring terminal with the operating part 120.