Abstract: A component mounting apparatus includes a first pair of clamping members installed to face each other and to move toward and away from a hollow rod, and a second pair of clamping members installed to face each other at a predetermined angle with respect to the first clamping members and to move toward and away from the hollow rod. The first clamping members are driven by a first actuator and the second clamping members are driven by a second actuator. Thus, components of various configurations including any rectangle can be easily clamped. Another component mounting apparatus includes a lightweight component positioning unit. A component is picked up by a component pick-up unit protruding from the component positioning unit whose width becomes larger, positioned, and held by the component positioning unit. Thus, damage of the component can be prevented and component pick-up and mounting operations can be rapidly performed.