In this study, the effect of the use of buckwheat flour on some quality characteristics of Fatayer which is a bakery product containing breakfast Zahter mixture as a top filling material and traditionally produced in Syria was investigated. The effect of buckwheat flour in different proportions on the physicochemical, textural, and sensory quality characteristics of Fatayer was investigated. In the study, 5 different types of Fatayers were produced with buckwheat flour ratios of 0, 30, 50, 70 and 100 % (g/g). The Fatayer produced with 100 % (g/g) wheat flour was used as a control. As the buckwheat content of Fatayers increased, the moisture content decreased from 26.61 to 14.92 % (w.b.), the fat content increased from 18.66 to 20.17 % (d.b.), and the weight loss decreased from 17.16 to 14.74 % (g/g) . The increase in the buckwheat flour ratio decreased the diameter (mm) and thickness (mm) of the Fatayers. It was observed that the increase in the buckwheat flour ratio causes an increase in hardness, flexibility, gumminess, chewiness and elasticity values, and a decrease in stickiness values. The sensory appearance, shape, color, hardness/softness, taste, smell, fragility, internal structure, chewiness and general acceptability scores of the pastries were detected in the ranges of 2.50-7.50, 2.30-7.70, 2.5-7.70, 2.30-8.40, 2.40-7.80, 4.30-7.30, 4.00-6.80, 3.40-7.60, 3.30-8.40 and 3.00-7.66, respectively. Considering the sensory properties of the samples, it was seen that the addition of 30% buckwheat flour was close to the control sample in terms of general acceptability. Considering the optimum chemical, physical, textural and sensory properties, it has been revealed that up to 50 % (g/g) Buckwheat flour can be used in the Fatayer formula.