A multifunctional screwdriver has a ratchet head, a matching shaft and a handle. The ratchet head has a center, a bottom side, a peripheral side, an upper side, a plurality of flanges, a plurality of grooves, a matching hole, two circular holes and a protrusion. The matching shaft has a first end, a second end, two embossments and a connecting hole. The handle has a front end surface, a back end surface, a mounting hole and a shape-matching hole.