Abstract: A method for inspecting transparent or semitransparent, liquid-filled containers as to whether or not the liquid in each of the container contains foreign matters. The inspection is carried out by passing the container in front of a television camera while the liquid in each container undergoes a spiral motion as it passes through an inspection region, and processing video signals generated from the television camera by the use of a unique controlling circuit. With this controlling circuit, distinction can be made between signals indicative of the presence of foreign matters in the liquid and that indicative of the presence of external flaws on the container.