A composite container lid which includes an inner cap fitted onto the container mouth portion by screw engagement, an over-cap fitted onto the inner cap, and an IC tag. The over-cap has a top panel and a skirt descending from the circumferential edge of the top panel. The inner cap has a top plate and a cylindrical wall descending from the circumferential edge of the top plate and has a thread formed in the inner surface thereof to come into screw engagement with the outer surface of the container mouth portion. An engaging means is provided between the inner surface of the skirt of the over-cap and the outer surface of the cylindrical wall of the inner cap to transmit the turn of the over-cap fitted onto the inner cap to the inner cap.