The invention provides a ball valve excelling in economy owing to the efforts devoted to the reduction of cost, enjoying light weight and high reliability, manifesting high and uniform accuracy, and enabling manufacture of compact finished products having a small interface dimension and provides a method for the production of the ball valve. The ball valve, wherein a stem insertion hole is formed in a counter-sunk portion at the center of the body, having the opposite side portions thereof plastic-worked such as flaring/ diameter-shrinking, of a specified-length tube, a pair of annular insert members are press-fitted into the opposite sides of the body, a ball is non-rotatably provided at the lower end of a stem inserted into the stem insertion hole, and the opposite end faces of the body is compression-formed so as to rotatably support/receive the ball by the pair of insert members. |