Artikel ini membahas efektivitas model pembelajaran Project Based Learning (PBL) dalam PJJ terhadap pemahaman materi. Metode penelitian yang digunakan pada yaitu kuantitatif dengan menggunakan angket kuesioner dan skala likert. Subjek penelitian yaitu siswa di berbagai daerah sebanyak 50 responden. Hasil penelitian menunjukkan bahwa 15 responden berada pada interval penilaian 79,9-95 (sangat efektif), 29 responden pada interval penilaian 64,7-79,8 (efektif), dan 6 responden pada interval penilaian 49,5-64,6 (cukup efektif). Berdasarkan hasil yang diperoleh Project Based Learning efektif digunakan yaitu berada pada interval penilaian 64,7-95. Dengan demikiaan, dapat dikatakan efektivitas model pembelajaran PBL (Project Based Learning) dalam PJJ erhadap pemahaman materi siswa ini masuk dalam kategori efektif.Katakunci: PJJ, Project Based Learning, materi.Abstract:This article discusses the effectiveness of the PBL (Project Based Learning) learning model in distance learning on students' understanding of the material. The research method used in this research was quantitative by using questionnaire and likert scale. The research subjects were 50 students in various regions. The result of research shows that 15 respondents were at the interval 79,9-95 (very effective), 29 respondents were at the interval 64,7-79,8 (effective), and 6 respondents were at the interval 49,5-64,6 (moderately effective). It shows that Project-Based Learning was effective to use that was in the assessment interval of 64,7-95. Therefore, it can be said that the effectiveness of the PBL (Project Based Learning) learning model in distance learning on students’ understanding of the material is categorized as effectiveKeywords: PJJ, Project Based Learning, material