A component mounting machine comprising: a chuck device held on a mounting head, the chuck device being provided with multiple types of chuck claws configured to clamp a component, a chuck claw switching mechanism configured to switch the chuck claw in use among the multiple types of chuck claws in accordance with the type of the component to be clamped, and a driving mechanism configured to cause the chuck claws switched by the chuck claw switching mechanism to perform a clamping operation, wherein the chuck claw switching mechanism is configured to use a cylindrical cam, the multiple types of chuck claws are arranged at predetermined intervals around the cylindrical cam, and a cam follower provided on each of the chuck claws is configured to fit into a cam groove in an outer peripheral surface of the cylindrical cam, wherein a tubular guide member that guides upward and downward movement of each of the chuck claws is provided concentrically on an outer peripheral side of the cylindrical cam, the respective chuck claws are configured to be moved upward and downward independently of each other by the cylindrical cam being rotated in a state where rotation of the tubular guide member is locked when the switching is performed to the chuck claw in use among the multiple types of chuck claws, the chuck claws not used among the multiple types of chuck claws are configured to be lifted to a retraction position not interfering with the clamping operation of the chuck claws in use, and the chuck claws in use are configured to be lowered to a clamping operation position below the retraction position, wherein a rotation locking member configured to lock the rotation of the tubular guide member during the switching of the chuck claw in use and a rotation locking member moving mechanism configured to move the rotation locking member between a lock position at which the rotation of the tubular guide member is locked and an unlock position at which the lock is released are provided in the mounting head, and wherein the respective chuck claws are moved upward and downward independently of each other by the cylindrical cam being rotated based on rotation of a rotary shaft of the mounting head in a state where the rotation of the tubular guide member is locked by the rotation locking member being moved to the lock position by the rotation locking member moving mechanism when switching is performed of the chuck claw in use. a chuck device held on a mounting head, the chuck device being provided with multiple types of chuck claws configured to clamp a component, a chuck claw switching mechanism configured to switch the chuck claw in use among the multiple types of chuck claws in accordance with the type of the component to be clamped, and a driving mechanism configured to cause the chuck claws switched by the chuck claw switching mechanism to perform a clamping operation, wherein the chuck claw switching mechanism is configured to use a cylindrical cam, the multiple types of chuck claws are arranged at predetermined intervals around the cylindrical cam, and a cam follower provided on each of the chuck claws is configured to fit into a cam groove in an outer peripheral surface of the cylindrical cam, wherein a tubular guide member that guides upward and downward movement of each of the chuck claws is provided concentrically on an outer peripheral side of the cylindrical cam, the respective chuck claws are configured to be moved upward and downward independently of each other by the cylindrical cam being rotated in a state where rotation of the tubular guide member is locked when the switching is performed to the chuck claw in use among the multiple types of chuck claws, the chuck claws not used among the multiple types of chuck claws are configured to be lifted to a retraction position not interfering with the clamping operation of the chuck claws in use, and the chuck claws in use are configured to be lowered to a clamping operation position below the retraction position, wherein a rotation locking member configured to lock the rotation of the tubular guide member during the switching of the chuck claw in use and a rotation locking member moving mechanism configured to move the rotation locking member between a lock position at which the rotation of the tubular guide member is locked and an unlock position at which the lock is released are provided in the mounting head, and wherein the respective chuck claws are moved upward and downward independently of each other by the cylindrical cam being rotated based on rotation of a rotary shaft of the mounting head in a state where the rotation of the tubular guide member is locked by the rotation locking member being moved to the lock position by the rotation locking member moving mechanism when switching is performed of the chuck claw in use.