The research seeks to analyze the impact of the accounting disclosure of sustainable development practices on accounting information's predictive ability. The study depends on a sample of 42 companies of those listed on the Egyptian Stock Exchange working in various sectors during the period from (2018-2022). The results of the study reveal that there is a positive relationship between the disclosure of sustainable development practices in its three dimensions and accounting conservatism as a measure of the predictive ability of accounting information, and, there is a positive relationship between the disclosure of sustainable development practices (as a cumulative index of three dimensions combined) and the price model of the value relevance of accounting information as a measure of the predictive ability of accounting information. Based on the results, the research recommends motivating the Egyptian firms to increase the level of accounting disclosure of sustainable development practices as a method of enhancing accounting information predictive ability to attract new investment opportunities.