To eliminate or alleviate the inequality of life chance caused by such factors such as social classes, sex, race, and religious belief is the aim of claiming equal educational opportunity. Hidden curriculum embraces perspectives of education, curriculum, knowledge, and learning which not only directly influence the selecting, distributing, and delivering school knowledge but also indirectly shape students' learning attitudes, beliefs, and values. Therefore, it is also a factor influencing equality of educational opportunity. After literature review of hidden curriculum approaches, this article provides four implications for equality of educational opportunity including giving each student equal opportunity to develop his/her abilities, examining the relationship between the justification of school knowledge and power, stressing the active role of the student's subject consciousness and multicultural education, and implementing school democracy.