This study aims to determine the graphical literacy levels of middle school mathematics teachers. The participants of the study consisted of 33 middle school mathematics teachers working in different provinces. The data of the study were collected with the help of the graphical literacy test created by the researchers. The data were analyzed by content analysis method. As a result of the study, it was seen that the teachers were more successful in the questions that required reading the data in the graph. It has been revealed that teachers are unsuccessful in reading beyond data questions that require higher-level thinking. In addition, the teachers had the most difficulty creating the graphs. In other words, it was determined that the graphical literacy levels of the teachers were low. Therefore, it is thought that studies to improve the graphical literacy skills of teachers in in-service training programs will be important.