An opening degree adjusting structure for a nozzle vane in a turbocharger, the structure comprising: a variable nozzle mechanism which is configured to change an opening degree of the nozzle vane by an actuator so as to change a flow rate of exhaust gas flowing to a turbine wheel; and a stopper which is configured to adjust an opening degree of the nozzle vane on a full-open side or a full-close side, the stopper being constituted by an immovable-side stopper part provided on an actuator bracket for attaching the actuator to a turbocharger body and a movable-side stopper part provided on a movable body, the moveable-side stopper part being configured to move with respect to the immovable-side stopper part and being contactable with the immovable-side stopper part, the actuator being constituted by an actuator body for generating a drive power and an actuator rod for transmitting the drive power of the actuator body, wherein the actuator rod extends from the actuator body to a nozzle vane side and is configured to advance or retreat, wherein a tip portion of the actuator rod is connected to the nozzle vane side by a connection mechanism, characterized in that the connection mechanism is adjustable in length, and comprises the moveable body connected to an outer lever at one end via a connection pin, an adjusting nut which is rotatably arranged in a window formed in the body, a lock nut for securing the body to the tip portion of the actuator rod, and a stopper bolt, which is screwed to the body to be disposed in parallel to the actuator rod, and a lock nut for securing the stopper bolt to the body, and wherein the movable-side stopper part is constituted by the stopper bolt and the lock nut, and the immovable-side stopper part is a stopper piece which is integrally formed with the actuator bracket. a variable nozzle mechanism which is configured to change an opening degree of the nozzle vane by an actuator so as to change a flow rate of exhaust gas flowing to a turbine wheel; and a stopper which is configured to adjust an opening degree of the nozzle vane on a full-open side or a full-close side, the stopper being constituted by an immovable-side stopper part provided on an actuator bracket for attaching the actuator to a turbocharger body and a movable-side stopper part provided on a movable body, the moveable-side stopper part being configured to move with respect to the immovable-side stopper part and being contactable with the immovable-side stopper part, the actuator being constituted by an actuator body for generating a drive power and an actuator rod for transmitting the drive power of the actuator body, wherein the actuator rod extends from the actuator body to a nozzle vane side and is configured to advance or retreat, wherein a tip portion of the actuator rod is connected to the nozzle vane side by a connection mechanism, characterized in that the connection mechanism is adjustable in length, and comprises the moveable body connected to an outer lever at one end via a connection pin, an adjusting nut which is rotatably arranged in a window formed in the body, a lock nut for securing the body to the tip portion of the actuator rod, and a stopper bolt, which is screwed to the body to be disposed in parallel to the actuator rod, and a lock nut for securing the stopper bolt to the body, and wherein the movable-side stopper part is constituted by the stopper bolt and the lock nut, and the immovable-side stopper part is a stopper piece which is integrally formed with the actuator bracket.