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INTRODUCTION: Electroconvulsive Therapy (ECT) is an effective and safe treatment method used in the treatment of various psychiatric diseases. However, negative attitudes associated with ECT are common. This causes many negative consequences, from the treatment preference to treatment response and stigma. In this study, we aimed to carry out a validity-reliability analysis of the ECT Perception and Knowledge Scale (ECT-PK), which was developed to determine the perception and knowledge levels related to ECT, and adapt it to Turkish. METHOD: The Turkish adaptation of the ECT-PK was made using the translation-retranslation method. Our study included 50 patients with schizophrenia, 50 patients with bipolar disorder, 50 patients with major depression who met the remission criteria determined separately for each disorder, and 150 healthy controls.. To measure test-retest reliability, the scale was re-applied to 30 patients randomly selected from the patient group 14–21 days after the first application of the scale. RESULTS: In our study, a significant difference was found in both the patient and control groups in terms of the history of ECT application in the past and the status of accepting ECT application when recommended, and the perception and knowledge subscales of the ECT-PK. These results support the construct and criterion validity of the ECT-PK. Cronbach’s alpha coefficient was found to be 0.85 for the perception subscale and 0.78 for the knowledge subscale. The intra-class correlation coefficient used to evaluate the test-retest reliability was 0.86 for the perception scale and 0.83 for the knowledge subscale. CONCLUSION: It has been shown that the ECT-PK is a valid and reliable measurement tool that can be used to measure the perception and knowledge levels related to ECT in both clinical and non-clinical groups.