This research was conducted because of the low score of IPS subject of fourth grade students of SD Babbussalam Pekanbaru. KKM or standard score set by the school is 80. The total number of the students of IV-5 class in SD Babussalam Pekanbaru is 20 students. They who reached KKM only 3 students (15%), while students who did not reach KKM were 17 people (85%), and the average is 57.25. The purpose of this research is to improve IPS learning outcomes of the students of class IV-5 of SD Babussalam Pekanbaru with the application of problem-based learning model. The results obtained from the activity of teachers at the meeting 1 cycle I obtained a percentage of 75% with good category, the second meeting increased to 85% with very good category, then at the first meeting of cycle II obtained a 90% percentage with very good category and at the second meeting, increased again to 95% with very good category. While student's activity at meeting 1 cycle I got 70% percentage with good category, second meeting increased to 80% with good category. Then at the first meeting of cycle II obtained a 90% percentage with very good category, and the second meeting increased again to 95% with very good category. Student learning outcomes on the mean score base or before the implementation of problem based learning that is 57.25, increased in daily repeat cycle I to 70, so the increase in the basic score to cycle I was 12.75 (22.27%). In the daily test of cycle II the average learning outcomes increased again to 80.2 so the increase in learning outcomes from baseline score to cycle II was 22.95 (40.09%). Student completeness in classical at base score 15% (not complete). After applied the problem-based learning model on the cycle I student's completeness classical increase by 45% (not complete) and in cycle II student's classical completeness increased by 75% (thorough). So, it can be concluded that by applying problem-based learning model,the IPS learning outcomes of the students of IV-Claas of SD Babussalam Pekanbaru can be improved.