[Perubahan kedudukan dan hak anak luar kawin pasca dikeluarkannya PutusanMahkamah Konstitusi No 46/PUU-VIII/2010 memberi banyak perubahan dalamtata hukum keluarga di Indonesia. Permasalahan yang akan dikaji dalampenelitian ini adalah mengenai kedudukan dan hak mewaris anak luar kawinsebelum dan sesudah dikeluarkannya putusan Mahkamah Konstitusi No. 46/PUUVIII/2010 serta melihat bagaimana penerapan putusan Mahkamah Konstitusi No.46/PUU-VIII/2010 dalam kasus serupa yaitu penetapan No. 0156/Pdt.P/2-13/PA.JS. Penelitian ini termasuk kedalam penelitian yuridis normatif denganmenggunakan metode case and statute approach. Hasil dari penelitian inidiketahui bahwa setelah adanya putusan Mahkamah Konstitusi No. 46/PUUVII/2010 anak luar kawin dapat memiliki hak-hak keperdataan kepada ayahbiologisnya. Dengan demikian, dikeluarkannya putusan Mahkamah KonstitusiNo. 46/PUU-VII/2010 memberikan perlindungan hukum kepada anak anak yangdilahirkan di luar perkawinan yang sah., The modification of the status and inheritance rights of illegitimate children‟s dueto Constitutional Court No. 46/PUU-VIII/2010 give many transformation inIndonesian family law. The problems taken in this thesis are about the status andthe inheritance rights of illegitimate children‟s before and after the ContitutionalCourt Decision No. 46/PUU-VIII/2010 issued and also how that ConstitutionalCourt Decision applied in the establishment No. 0156/Pdt.P/2013/PA.JS. This is ajuridical normative research by using case and statute approach. The result of thisresearch are, by the issued of the Constituional Court Decision No. 46/PUUVIII/2010 the illegitimate children can have an inheritance rights to theirbiological father as long as they can prove that there is a blood relation betweenthem. So, it can be said that the Contitutional Court Decision No. 46/PUUVIII/2010 give a legal protection to the illegitimate children to have their rights.]