This study investigates the term "lack of privacy and personal space" for its influence on the personality traits of persons. This research aims at inquiring the existence of any correlation between the personality traits on one hand, and the lack of privacy and personal space on the other. In this regard, the research focused on teenage girls, in their third stage of adolescence, in two different environments. The subjects of the research were: Egyptian teenage female students (N=35) and foreign teenage female students from East Asia countries to study at Al-Azhar university (N=35), both groups aged 18:20 and were assessed using A scale – measure – of privacy and personal space, a scale to analyze the physical environment (prepared by the researcher) and Eysenck personality questionnaire (translated into Arabic by Gabber Abdel-Hamyeed and Mohamed Fakhr Al-Islam). The place of the study: Cairo. The research adopted the comparative method.