The aim of the present study was to identify the effect of using the TRIZ theory to develop creative thinking skills in solving environmental problems among students of the third grade of preparatory. The study included 40 students of the third grade of preparatory who study the environmental problems .The current study seeks to verify the validity of the following hypotheses ,there are differences of statistical significance at the level of  between the average scores of students in the prefectures of the tribal and in favor of the post-calendar for the skill of (fluency) in solving environmental problems, there are differences of statistical significance at the level of between the average scores of students in the prefectures of the tribal and in favor of the post-calendar for the skill of (flexibility) in solving the environmental problems, there are differences of statistical significance at the level of between the average scores of students in the prefectures of the tribal and in favor of the post-calendar for the skill of (originality) in solving the environmental problems ,there are differences of statistical significance at the level of between the average scores of students in the prefectures of the tribal and in favor of the post-calendar according to the total skills, there are statistically significant differences between the mean scores of the control group and the scores of the experimental group in the post-evaluation of the creative thinking scale in favor of the experimental group.