A ground anchor comprises a resistance plate consisting of some bendable sections driven slantly to a direction from a predetermined depth by the coaction of driving force and soil resistance applied thereto during driving operation so that they are set in such a manner that their maximum effective resisting surfaces may be easily directed at a right angle with the direction of the tension force imparted thereto. These bendable sections are kept straight by means of a regulating rod so as to be driven straightly inward until they reach the predetermined setting depth, and start bending at the predetermined depth, when the control of the regulating rod is released from outside at any time, so as to be inclined and driven inward to any required direction.