Abstract: The main elements of the fence post driving and pulling apparatus include a frame, a track, a traveling slide, means for mounting the frame on a tractor, means for selectively securing a fence post to the traveling slide, and means for driving the traveling slide. The frame mounts to a tractor and the track is formed in the frame. The traveling slide is disposed for substantially vertical displacement within the track as driven by a hydraulic cylinder which is connected between the frame and the traveling slide. The hydraulic cylinder is actuated by the hydraulic power system available on the tractor upon which the device is mounted. A first clamp surface projecting from the traveling slide and an adjacent cam clamp surface presented by a cam which is rotatably connected to the traveling slide provide means for selectively securing the fence post to the traveling slide. A fence post is brought into place upon the face of the traveling slide between the first clamp surface and the cam clamp surface.