The aim of this study was to adapt the Turkish version of the Experiences in Close Relationships–Relationship Structures Questionnaire in a sample of Turkey. Study I was conducted to prove the reliability and validity of the results obtained as a result of the adaptation of the Experiences in Close Relationships–Relationship Structures (ECR-RS) Questionnaire to Turkish culture. The study showed that the Experiences in Close Relationships–Relationship Structures Questionnaire and its subscales were reliable and valid. The study showed that the ECR-RS subscales correlated with the Relationship Questionnaire, the Relationship Styles Questionnaire, the Rosenberg Self-Esteem Subscale, the Sociotropy-Autonomy Scale, the Contact with parents and the Relationship experience, denoting content validity of the Experiences in Close Relationships–Relationship Structures Questionnaire. According to the research results, the Experiences in Close Relationships–Relationship Structures Questionnaire are a reliable and valid measurement tool that can be used for the purpose of evaluating attachment representation in Turkish culture. In addition, this study provides attachment researchers with a basis for reviewing the assumption that dimensional models overlap with categorical models. It is suggested that The Experiences in Close Relationships-Relationship Structures Questionnaire be adapted to different relationship structures (e.g., therapist, god, ideological groups), retested on different age groups and its relationship with personality traits and psychological problems be investigated.