This research is motivated by the low learning outcomes of students. The aim of the study was to describe the increase in student learning outcomes with the Problem Based Learning model in integrated thematic learning in class V SD Negeri 08 Balimbing. This type of research is Classroom Action Research using a qualitative approach and a quantitative approach carried out in 4 stages, namely planning, implementing, observing, and reflecting. It was carried out in two cycles, cycle I consisted of 2 meetings and cycle II consisted of 1 meeting. The research subjects were teachers and students of class V SD Negeri 08 Balimbing, totaling 19 people. The results showed that the observation of lesson plans for cycle I averaged 83.32% (B) increased in cycle II 94.44% (SB), in cycle I teacher activity averaged 82.14% (C) increased in cycle II 96 .42% (SB), in the activity of students in cycle I an average of 82.14% (C) increased in cycle II 96.42% (SB), and student learning outcomes in cycle I averaged 77.11 (C) increased in cycle II 88.54 (B). Thus it can be concluded that the PBL model can improve student learning outcomes in class V SD Negeri 08 Balimbing.