The article touches on the problem of an extension of an arbitration agreement towards non-signatories. Firstly, the author describes and categorizes grounds for such extension in the comparative perspective taking into account opinions formulated by international practitioners, court decisions and arbitral awards. Secondly, the author evaluates them through a perspective of a possibility of their application to the Polish legal system. The author conducts an analysis of the grounds for the extension of arbitration agreement towards non-signatories under the current Polish statutory measures and tries to compare them to those existing in international context. Moreover, the article concerns potential obstacles and threats related to an adoption of these grounds in Polish law.