This study aimed to suggest a direction for judging and interpreting the likelihood of confusion regarding the configuration of bags, which may constitute an act of unfair competition under Article 2, 1 (a) of the Unfair Competition Prevention and Trade Secret Protection Act. Key discussions included the following issues: establishing a concept for bag configuration corresponding to “product mark” that can be protected according to the Article 2, 1 (a), and applying a principle of law to the overall visual impression, which serves as a criterion for judging the identityᆞsimilarity of product mark as a premise of the likelihood of confusion. As a direction of interpretation towards the issue, it was proposed that it is necessary to expand the understanding of the material and quality of bags and to judge the likelihood of confusion based on observations in the actual use environment for intended use. Furthermore, as to making judgments regarding the likelihood of confusion according to the characteristics of the customer base based on the price factors of goods and whether such goods belong to a competitive business, it was pointed out to actively reflect the reality of the counterfeit market, including the status and aspects of transactions involving goods.