The object of the present invention is to provide component mounting apparatus and method wherein components supplied from component supplying members can be simultaneously or continuously held by component holding members without being affected by positional displacements of the component holding members to a head, a positional displacement of the component supplying members or the like. With a positional displacement amount (Δy) along a Y direction to a reference position of a nozzle taken into account, at a component supply cassette, driving a motor (880) for moving components one by one along the Y direction to a component supply position (89) is controlled, thereby positionally adjusting the component at the component supply position and absorbing the positional displacement amount.