To enable a beginner to train golf at home, and find the defect by slidably and rotatably pivoting a rotary shaft on a rail by fitting the rotary shaft of a sliding mat base in the rail of a baseplate.

The reverse of a sliding mat base 2 is sandwiched by 7a lower part of a rubber tee 5 and a rotary shaft 3 to be fixed by screw fastening. The rotary shaft 3 is projected downward, and the tip is formed into an umbrella shape to be fitted in a rail of a baseplate 1 to be is pivoted. Then, the sliding mat base 2 meshes with the baseplate 1 to be slidably and rotatably supported without separating. A grip 7 is arranged in a right end part of the sliding mat base 2, and the sliding mat base 2 is moved along a rail of the baseplate 1 to be set in a start position. When swinging in this state, the sliding mat base 2 moves and rotates according to a swing state, so that the state is visually confirmed to find a defect of a swing.