Nowadays, it became a necessity to face the ear's challenges by adopting creative thinking skills in the designing process according to scientific foundations and methodology that aim to track the recent updating and adapting for the rapidly changing ear. That is to prepare the student to be creative and capable to solve various designing problems creatively. The research assumes that the designing process practices have a positive effect in developing the creativity's ability.  This means, that there is a parallel relationship between them.  That means, when the individual's designing process practices increase the creative thinking abilities increase as a result. This was proven through using a designed questionnaire and applying a capacity test for the creative abilities for the sample group. The results were clear in two issues;  1-The effect of designing practice process in the creative thinking skills development. 2-The most influential factor on creativity in the design process.