Fierce competition in the markets may prompt the market participants, who are already engaged in contractual relations, to enter into more advantageous agreements by breaching their existing contracts.  Although each person is free to violate a contract and enter into a new one with another party, inciting a contracting party to breach its contact is against the principles of morals and good faith.  Hence, the business ethics is based on the principle that each market participant will enter into fair competition in order to find customers and employees and will not incite the costumers or employees of its competitors.  This study deals with the aspects of the act of inciting the breach or termination of a contract in the unfair competition law.  The first part focuses on the historical background of the act and its place amongst the comparative law and the Turkish law.  The study proceeds with a detailed examination of Article 5/I-b of the Turkish Commercial Code by means of separate analysis of each sub-paragraphs of this article, which, by assuming the acts of inciting the breach or termination of a contract as unfair competition, brought a new dimension to the Turkish law.  Thus, all the acts of inciting the breach or termination of a contract with whichever motive, which are not within the scope of the special provisions of Article 55, may be considered as unfair competition by virtue of the general provision set forth under Article 54 of the Turkish Commercial Code.  The last part deals with the conditions of the foregoing and the most common examples that may be encountered.