Although international laws and laws of each country have made a lot of progress in securing and enforcing religious freedom, however, religious inequality is still an observable reality at all levels. This article shows some basic information about the state of religious inequality under some fundamental aspects. First, the author clarifies the concept of religious equality. Next, the article indicates international laws related to secure the religious equality. The author cites remarkable results of Pew Forum’s Global Sociological Survey of religious equality. Finally, the article briefly introduces some social researchers’ views on the issue of religious freedom with a focus on the “religious equality”.