Research on anxiety in a foreign language-learning context is well-documented; however, few studies have directly focused on anxiety occurring within writing contexts despite the fact that writing anxiety is known to affect students' learning. The present study examined the effectiveness of concept mapping considering students' writing anxiety. Participants completed writing anxiety scales and were randomly assigned to three groups before completing a writing task: concept mapping, idea listing, or an unrelated task. Results indicated that, especially for students with low trait-level writing anxiety, concept mapping positively influenced the quality of writing content. Teaching implications will be discussed in the light of the results of this study.