The aim of the research is to identify environmental advocacy and its relationship to improving the environment in the petroleum sector. The study community included all employees of the Cooperative Society for Petroleum, Misr Petroleum Company, Agiba Petroleum Company), where a sample of (450) was selected between workers and leaders, senior and middle leaders and leaders. The researchers used the environmental advocacy scale for workers in the petroleum sector, the environmental advocacy scale for officials in senior management in the petroleum sector. The researcher used statistical methods such as the Cronbach's alpha correlation coefficient and the half-segmentation method to calculate the stability of the research tools. The arithmetic mean, and the correlation coefficient (Pearson) in order to identify environmental advocacy and its relationship at improving the environment in the petroleum sector in the three companies and the total measure of the three companies.   There is a statistically significant relationship for the environmental advocacy scale for officials in the senior management in the petroleum sector in the Petroleum Cooperative Society, Misr Petroleum Company, and Agiba Petroleum Company, and the total scale of the three companies. The research recommends the importance of emphasizing environmental advocacy towards the petroleum sector, including oil companies, through the work of programs that raise awareness of the feasibility of the importance of environmental advocacy and improving the environment in this sector, and the need to activate the functions of community organizations in caring for the environment through the enactment of laws and legislation that prevent and criminalize environmental abuse. The importance of oil companies' adoption of environmental advocacy leads to increasing and raising performance rates and improving environmental performance, the most important of which is the need for workers and officials in oil companies to know the factors and obstacles that limit the development of plans for social responsibility programs towards achieving environmental advocacy in which oil companies operate.