The purpose of this study was to inquire the meaning of gender main-streaming inclusive curriculum into schools by interviewing three elementary school principals. The interviews included the understanding, praxis, difficulties and opinions of the policies of gender main-streaming from the interviewees. The conclusions were as follows: 1. The principals expressed that the school conditions were not suitable for the gender main-streaming curriculum to be included. 2. The relationship of the gender main-streaming and the gender equity education were mutual support and mutual inclusive. There are four suggestions of the research: 1. To establish the legitimacy of gender main-streaming curriculum in school. 2. To integrate the levels and organizations of gender main-streaming curriculum in schools. 3. To build the website of alterative instruction in gender main-streaming curriculum. 4. To listen and to respond the needs of gender main-streaming inclusive curriculum from local schools.