an unbalance correction device of a high speed rotary apparatus which can prevent the lowering of productivity in the production line of a high speed rotary apparatus while reducing variation in the posture of a workpiece supported by a jig and suppressing vibration of a member for securing the workpiece to the jig , and can enhance the precision of unbalance correction . the unbalance correction device of a high speed rotary apparatus includes a plurality of claw structures for fixing , by clamping , a workpiece to a turbine housing section ; a cylinder mechanism for moving and energizing the claw structures , a solenoid valve for adjusting the moving amount and energizing force of the claw structure by the cylinder mechanism ; a position sensor for detecting the position of the claw structure ; and posture control means for controlling each solenoid valve such that the position shift of the claw structure detected by the position sensor becomes smaller than its acceptable value .