Abstract: Implementation of HOTS-Oriented Problem Based Learning on Science Literacy Ability. Objectives: Knowing and analyzing scientific literacy skills by applying the HOTS-oriented Problem Based Learning (PBL) model. Methods: The type of research in this research is experimental research. The research subjects were fourth grade students of SD Negeri 5 Metro Pusat. The research design used is a pre-experimental design and uses one form of design, namely the one group pretest-posttest design. The HOTS indicators used in this study are identify scientific issues (problems) explain scientific phenomena, using scientific evidence. Findings: Based on the results of the data analysis, the pretest score for the scientific literacy ability of students achieved by the experimental class was 9.25 and the posttest score was 11.90. Conclusion: The results of the research that have been carried out show that the application of high order thinking skills (HOTS) based on problem based learning (PBL) to improve scientific literacy skills has the impact of increasing n-gain by 0.21 in the low category. In the analysis of the average n-gain score on the highest scientific literacy ability indicator, namely the use of scientific evidence.Keywords: higher order thinking skills, problem based learning, science literacy.Abstrak: Implementasi Pembelajaran Berbasis Masalah Berorientasi HOTS terhadap Kemampuan Literasi Sains. Tujuan: Mengetahui dan menganalisis kemampuan literasi sains dengan menerapkan HOTS berbasis problem based learning. Metode: Jenis penelitian dalam penelitian ini adalah penelitian eksperimen. Subyek penelitian adalah siswa kelas IV SD Negeri 5 Metro Pusat. Desain penelitian yang digunakan adalah pre-experimental design dan menggunakan salah satu bentuk desain yaitu one group pretest-posttest design. Indikator HOTS yang digunakan dalam penelitian ini adalah mengidentifikasi isu ilmiah (problem), menjelaskan fenomena ilmiah, menggunakan pembuktian ilmiah. Temuan: Berdasarkan hasil analisis data, nilai pretest kemampuan literasi sains siswa kelas eksperimen adalah 9,25 dan nilai posttest adalah 11,90. Kesimpulan: Hasil penelitian yang telah dilakukan menunjukkan bahwa penerapan keterampilan berpikir tingkat tinggi (HOTS) berbasis problem based learning (PBL) untuk meningkatkan kemampuan literasi sains berdampak pada peningkatan n-gain sebesar 0,21 pada kelompok rendah. kategori. Pada analisis rata-rata skor n-gain pada indikator kemampuan literasi sains tertinggi yaitu penggunaan bukti ilmiah.Kata kunci: keterampilan berpikir tingkat tinggi, pembelajaran berbasis masalah, literasi sains.DOI: http://dx.doi.org/10.23960/jpp.v12.i3.202236