A badminton racket that is strong in respect to impact and twist and that is high in surface stability and a manufacturing method of the badminton racket is provided. A badminton racket includes a frame formed circularly, a shaft joined to the frame, a joint installed reaching inside the frame and the shaft at a joint portion of the frame and the shaft, and an expandable resin placed between the joint and the frame. A badminton racket manufacturing method includes an expandable resin placing process that places an expandable resin that expands when heated on an outer periphery of a portion of a joint, the joint being to be installed to reach inside a frame formed with the resin sheet tube and inside a shaft, the portion being to be installed in the frame.