PURPOSE: To make it possible to promote work efficiency of anchor execution in a construction field by inserting an anchor member in a chuck, and closing a movable chuck to interlock an screw thereof with a screw section of the anchor member.

CONSTITUTION: A connection end 3 is connected to the front end of an anchor driving machine 2, outside rings 7 and 7 are turned in an open direction of a chuck 9, and a movable chuck 11 is opened by a projection 6. After that, an anchor member 8 is inserted in the chuck 9 to turn the outside rings 7 in the opposite direction, and the movable chuck 11 is closed by a projection. Then, a screw 10 of the movable chuck 11 is interlocked with a screw section of the anchor member 8, and the anchor member 8 is fixed by the chuck 9 without deforming the secre section. After that, the anchor driving machine 2 is operated to drive the anchor member 8 in a base metal such as concrete, etc. Accordingly, a washer is held with the anchor member 8 to have no use for a double nut, and there is no fear that the screw section of the anchor member 8 is damaged.