Adoption relationship can be defined as the status resulting from the finalization of the court decision on adoption. Turkish Civil Code No. 4721 (TCC) Art. 305 to 320 regulates adoption on the basis of minors, and unlike the Code No. 743, the legislator has found it appropriate to address adoption in a way to create similar effects to the kinship based on blood relation. Within this framework, as in the case of kinship based on blood relation, as a rule, this relationship should not be abolished after the finalization of the adoption decision. However, this is not mandatory. TCC recognizes that the adoption relationship may be abolished for some exceptional reasons based on the principle of the best interests of the minor. These reasons, which are regulated in a limited number in Art. 317 and 318 of the TCC, are the absence of consent, other deficiencies on the merits and procedural deficiencies. However, the merely existence of one of these reasons does not always mean that the adoption relationship will be abolished. TCC Art. 319 also includes a period of prescription for the right to sue for the abolition of the adoption relationship. The aim of this study is to evaluate these exceptional grounds under the TCC by taking into consideration the decisions of the Constitutional Court regarding the relevant provisions.