In the process of teaching Turkish as a foreign language, the functional use of the four skills - listening, speaking, reading, and writing - is important. The teaching of writing, which is a skill that concretizes the language, consists of certain stages and steps. The stages of writing instruction can be listed as alphabet, vocabulary, sentence, paragraph, and text instruction. In the teaching of writing in Turkish as a foreign language, the stages include motivation and pre-informing, examining sample texts, preparation, creating a draft, writing by editing, correction, and publishing. Feedback is essential in writing exercises for students to improve their writing skills. Through the feedback they receive, students have the opportunity to correct their mistakes. In this regard, the main aim of this research is to determine the effect of feedback on the writing skills of foreign students learning Turkish as a foreign language. This study was conducted with 30 foreign students studying Turkish language education at Süleyman Demirel University Turkish and Foreign Language Teaching Application and Research Center (SDÜTÖMER), who came from different countries to Turkey. The Written Expression Evaluation Scale prepared by SDÜTÖMER was used as the measurement tool in the study. T-test was used as the statistical method in the analysis of the data obtained at the end of the measurement process. As a result of the analyses, statistically significant differences in favor of the experimental group were found. With this study, it was concluded that feedback has positive and significant effects on the writing skills of foreign students learning Turkish as a foreign language.