The study aimed to identify the effect of intellectual humility on achieving academic achievement among secondary school teachers in Jeddah schools in Saudi Arabia. This is through studying and analyzing the dimensions of intellectual humility represented in (recognition of others' right to excel and achievement, openness to new information, ability to predict and evaluate, emotion regulation and other aspects of personality, enhancing confidence).The study also aimed to identify the level of academic achievement of secondary school teachers, and the researchers followed the descriptive analytical approach (survey) in their study. The study sample consisted of (290) teachers and a questionnaire was applied to them. The study concluded with a set of results among them that there is a direct correlation between intellectual humility and academic achievement. This was clarified through the Pearson correlation, and the study also found that the mean of the level of academic achievement reached (3.97) with a standard deviation (1.721), and it is clear from the mean value that it is located at a high degree, and this indicates that the level of academic achievement of secondary school teachers is high.