The study of correlation between metacognitive skills and reasoning skills on problem solving ability simultaneously in class used PBL learning model is still less. This study aims to reveal the relationship between metacognitive skills and reasoning skills on problem solving ability of the students in STKIP Persada Khatulistiwa Sintang in learning mathematics used Problem Based Learning (PBL) model. This research involves 29 students of 3rd semester at Primary School Teacher Education Department. This research was a correlational research. Data were analyzed using multiple regression analysis. The result of analysis shows that there is a correlation between metacognitive skills and reasoning skills on problem solving ability of the student in learning mathematics based on Problem Based Learning (PBL) model. This is indicated by the significance value of 0.046 < 0.05. This is also indicated by the number of contribution of metacognitive skills and reasoning skills toward problem solving abilities of 20.41% and 0.69%. It appears that the relationship is an metacognitive skills and reasoning skills that has the greatest contribution to problem solving abilities.