The informal or hidden economy is the second component in the actual economy of any country. An economy is hardly devoid of images of informal economic activities. The purpose of this study is to conceptualize the prevailing knowledge about the informal sector engagement in Egypt tourism Industry. Though the research on the informal sector has been a growing field in the developing countries, the limited studies conducted about the informal sector engagement Egypt tourism industry is a significant problem. The empirical evidence brings new knowledge on informal sector engagement in the Egyptian Tourism Industry to build the extent literature persistently. As the policy makers need the information about the informal sector for effective decision making, the organization and categorization of the information related to the area of the study is significantly important. This review paper is based on the current literature on the informal sector in the Egyptian Tourism industry.