A golf swing assistance device has a base having a flat upper surface with a hitting spot, a shallow lower surface indented adjacent to a hitting spot of the upper surface. The hitting spot is located in the middle of a golf swing that a user takes. A rear position sensor is located behind the golf swing, and behind the hitting spot. A front position sensor is located after the swing and in front of the hitting spot. A ball holder has a ball holding plate, a ball holding arm and a ball holder connector. A block receives the ball holder connector. An adjusting mechanism allows vertical adjustment of the ball holder connector. A ball target has a ball end, a ball target arm and a ball target connector. Also, position sensors mounted on stands can monitor other sections of the golf swing.