To widen a sweet spot and to receive and return a ball according to the will of a player by forming the eccentric core shaft connected to a frame outside the extension line of the left and right center line of the gut surface of a racket.

In sports using a ball or shuttlecock to mutually hit the same by a racket 1 having a gut surface (net surface) 2 the eccentric core shaft 6 connected to a frame 3 is formed on the eccentric core axial line 5 outside the extension line of the left and right center line 4 of the gut surface 2. By this constitution, the ball can be received and returned according to the will of a player and the gut surface of the racket can be used over a wide region. Further, this racket can correspond to the power of the ball of a partner and becomes easy to sweep by moment effect and further becomes easy to generate a curved ball such as topspin. There is the same effect in backhand or double- hand and the wrist, an elbow or the shoulder is not damaged regardless of a hard or soft ball.