ABSTRAK Nur Fadhilah Nusbah, STB: H1A13114, Tanggung Gugat Kerugian Immateril Akibat Ingkar Janji Kawin Ditinjau Dari Kitab Undang-Undang Hukum Perdata Terhadap Putusan Mahkamah Agung Nomor 149k/Pdt/2008, di bawah bimbingan Bapak Guswan Hakim, sebagai pembimbing I dan Bapak Haris Yusuf, sebagai pembimbing II. Tujuan dari penelitian adalah untuk mengetahui apakah janji kawin yang dimaksud dalam Putusan Mahkamah Agung Nomor 149k/Pdt/2008 telah sesuai dengan prinsip-prinsip hukum perjanjian dan apakah kerugian immateril akibat adanya janji kawin dalam Putusan Mahkamah Agung Nomor 149k/Pdt/2008 dapat dimintai pertanggung jawaban sesuai dengan Pasal 58 KUHPerdata. Tipe penelitian ini adalah penulisan normatif. Bahwa dalam penelitian ini berpedoman kepada peraturan perundang-undangan yang berlaku (hukum positif) yang relevan dengan masalah yang diteliti serta berkaitan dengan kenyataan yang harus diteliti. Penelitian ini menghasilkan kesimpulan yaitu : pertimbangan hakim Pengadilan Tinggi Sulawesi Tenggara dan Pertimbangan Hakim Mahkamah Agung didalam amar putusannya yang menyatakan perbuatan janji kawin yang dilakukan tergugat adalah wanprestasi/cidera janji tidaklah tepat, karena janji kawin yang diucapkan tergugat tidak memenuhi Prinsip-Prinsip Hukum Perjanjian dan unsur-unsur syarat sah perjanjian dalam pasal 1320 KUHPerdata sehingga bukan suatu perbuatan wanprestasi/cidera janji melainkan perbuatan melawan hukum. Pertimbangan hakim Pengadilan Tinggi Sulawesi Tenggara dan Pertimbangan Hakim Mahkamah Agung yang menyatakan tergugat wajib membayar ganti kerugian immaterial kepada penggugat tidak sesuai dengan pasal 58 KUHPerdata, karena janji kawin yang diucapkan tergugat tidak dapat dimintai pertanggung jawaban berupa ganti kerugian karena janji kawin tersebut tidak disertai dengan adanya pengumuman kawin dimuka umum, melainkan ganti kerugian karena perbuatan melawan hukum. BSTRACT Nur Fadhilah Nusbah, Stb: H1A113114, Liability for Immaterial Loss Due to the Denial of Premarital Agreement Reviewed from Indonesian Civil Code Based on Supreme Court Verdict Number 149k/Pdt/2008, under the guidance of Mr. Guswan Hakim as first supervisor and Mr. Haris Yusuf as second supervisor. The purpose of this research is to know if a premarital agreement in the Supreme Court Verdict No. 149k/Pdt/2008 was appropriate to the principles of legal agreements and if immaterial loss caused by a denial of premarital agreement based in the Supreme Court Verdict No. 149k/Pdt/2008 could be held liable pursuant to Article 58 of the Indonesian Civil Code. This research uses a normative legal research method. Which is a method that refers to regulations that is still valid (positive law) and relevant to the issue being observed and also related to the facts which is being observed. This research concludes that: both the appellate court judges’ consideration and the Supreme Court judges’ consideration in the verdict stated that the premarital agreement made by the defendant as a breach of contract was not appropriate, because the premarital agreement made by the defendant doesn't meet the principle requirements pursuant to article 1320 of the Indonesian civil code so it was not a breach of contract but instead as a tort. The appellate court judges’ consideration and the Supreme Court judges’ consideration that stated the defendant must give compensation to the plaintiffs immaterial loss was not accordant to article 58 of the Indonesian civil code, because of the defendants premarital agreement liability, which is in a form of compensation, cannot be held liable because the premarital agreement wasn't publicly announced but rather than it was a compensation given because of a tort.