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Introduction In systemic sclerosis (SSc), disease-related manifestations are expected to adversely impact patients’ self-esteem. This study aimed to evaluate the validity and reliability of the Turkish version of the Rosenberg Self-Esteem Scale-Short Form (RSES-SF) in SSc patients.Material and Methods In this multicenter cross-sectional study, patients fulfilling the ACR/EULAR criteria were included.Convergent validity was assessed through correlations between RSES-SF and the Body-Cathexis Scale, Scleroderma Health Assessment Questionnaire (sHAQ), and five Likert-type questions.Discriminant validity was tested by comparing RSES-SF scores across disease subtypes, organ involvements, employment, and education.Test–retest reliability was evaluated in 59 patients after three weeks using intraclass correlation coefficient (ICC). Internal consistency was determined with Cronbach’s alpha.Results A total of 100 systemic sclerosis patients (mean age: 52.4 ± 11.4 years; 88% female) were included in the study.The mean disease duration was 8 ± 6.3 years. 56% of the patients had the limited subtype, and 40% had the diffuse subtype and 4% sine SSc; 54% had ILD), 52% had gastrointestinal involvement, 29% had digital ulcers, and 13% had PH).We found a strong negative correlation was found between the total score of the RSES-SF and the Body-Cathexis Scale (r = -0.634, p<0.001).The scale was also significantly correlated with sHAQ (r = -0.427, p<0.001), GIS-VAS (r = -0.509, p< 0.001), general health-VAS (r = -0.388, p<0.001), digital ulcer-VAS (r = -0.352, p=0.001), and Raynaud-VAS (r = -0.307, p=0.003).Additionally, significant correlations were found with the Likert-type questions (Likert-2: r = -0.368, p<0.001; Likert-3: r = -0.463, p<0.001; Likert-4: r = -0.436, p<0.001; Likert-5: r = -0.502, p<0.001).In the analysis of discriminant validity, self-esteem was found to be significantly lower in those with PH (26.0 ± 6.6 vs 29.6 ± 4.4; p=0.044), in patients with digital ulcers (27.5 ± 5.5 vs 29.8 ± 4.5; p = 0.045), and in those with mRCS >10 (26.9 ± 5.5 vs 30.3 ± 4.4; p=0.006).Self-esteem was significantly higher in patients with an education duration of >8 years (31.0 ± 4.9 vs. 28.0 ± 4.6; p=0.003) and in those who were employed (31.5 ± 4.3 vs. 28.0 ± 4.8; p=0.003).The internal consistency was good (Cronbach’s alfa=0.780) and the test-retest reliability was excellent (ICC=0.952; 95% CI:0.919–0.971).Conclusions The Turkish RSES-SF is a valid and reliable instrument for assessing self-esteem in SSc patients. Its strong associations with body perception, health status, organ involvement, and functional limitations support its use in both clinical practice and research for psychosocial evaluation in SSc.Abstract P.316 Table 1Demographic and clinical characteristics of patients with systemic sclerosisAbstract P.316 Table 2Correlation of the total score of the Rosenberg self-esteem scale and each item with the body image seale, likert-type questions,and sHAQ