A chuck device is provided with multiple types of chuck claws clamping a component, a chuck claw switching mechanism switching the chuck claw in use among the multiple chuck claws based on the type of component to be clamped, and a driving mechanism causing the chuck claw subjected to the switching by a chuck claw switching mechanism perform a clamping operation. The chuck claw switching mechanism causes the respective chuck claws to move vertically independently of each other and performs switching of the chuck claw in use by a rotating cylindrical cam in a state where rotation of a tubular guide member placed on an outer peripheral side of a cylindrical cam is locked. A rotation locking member locking the rotation of the tubular guide member during switching of the chuck claw in use and a cam follower moving the rotation locking member are disposed in a mounting head.