Education in Curriculum 2013 has to create and design learning for 21^st century. The skills that must be possessed in this century such as critical thinking, problem-solving, creativity, collaboration, communication, science literacy, etc. STEAM-integrated project based learning is a learning design that consist 5 aspects, namely science, technology, engineering, art, and mathematics that are implemented with project-based teaching and learning activities. The research's objective is to observe the effectiveness of using STEAM-integrated project based learning model to improve students’ 21^st century skills. The research method is qualitative-descriptive by reviewing the literature in as many as twenty journals. Study shows that there are many Project Based Learning (PjBL) models built into STEAM that are effective in enhancing one of skills in 21^st century. Future research must explore the implementation of STEAM-integrated project based learning during the Covid-19 pandemic by developing e-learning material based on STEAM-PjBL that can be used in online learning.