Salt stress is one of the major abiotic stress factors in agricultural production. The aim of the present study is to investigate the effects of irrigation water salinity and the influence of supplemental Ca²⁺ on the alleviation of the deleterious effects of salinity stress in carrots (Daucus carota L.). The study was carried out in a greenhouse located at Uludag University Mustafakemalpaşa Vocational School. In addition to four NaCl levels of 0, 20, 40, 60 and 80 mM in irrigation water, the treatments were repeated with 0, 4 and 8 mM Ca²⁺ applied to the soil at each NaCl level. Research was laid out in randomized parcel design with five replications and 12 plants in each replication on lysemeters formed in greenhouse. According to the results, increasing irrigation water salinity decreased the marketable yield. In the quality parameters (fruit juice content, soluble solids, reducing sugar, β-carotene and vitamin C), adverse effects of salt stress were observed at increasing salt concentrations above 20 mM. Ca²⁺ applications in the saline soil alleviated the negative effects of salt on soluble solids, reducing sugar, β-carotene and vitamin C contents of carrots. On the other hand, it has been determined that there is no positive effect of calcium applications on marketable yield, fruit juice content and total acid values. These findings suggest that a proper management of the salt concentration of the irrigation water plus additional Ca²⁺ applications to soil may provide an efficient tool to improve the some quality parameters of car rots.