There are some factors that affect problem solving achievement. One of these factors is the skills of four operations. The literature search has shown no recent research investigated impact of four operations achievements on problem solving. This research aims to analyze the relationship between four operatinos and problem-solving success of primary school fourth-graders. A correlated research model has been used from common survey models to study the relationship between four operations and problem solving achievement. In the 2020-2021 school year, 462 elementary schools in Kayseri Turkiye formed the target population of the study. Stratified sampling has been used because research results will also be studied on socio-economic levels. In the study two data collection tools, four operations achievement tests developed by the researcher and a problem-solving achievement test were used. In accordance with the research's objectives, the Pearson Correlation coefficient has been calculated to examine the relationships between the four operations and the points gained from the problem-solving achievement tests. Problem-solving achievement test scores have shown a moderately positive meaningful relationship between four operations achievement scores, and four operations success accounts for 22% of the variation in problem-solving success. It has been concluded that four operations achievement positively impact problem-solving achievement, but not enough alone to achieve problem-solving achievement.