Abstract: The 9/11 events brought dramatic changes to the legal and political territory of Afghanistan. In 2004, this country enacted new liberal constitution on the base of democracy. So, this article explores briefly liberalism, Afghanistans 2004 Constitution, and it will also determine in which parts this constitution has compatibility with liberalism, and in which parts it is opposite of that. At the end of the research I found that majority elements of liberalism have been inflected in this constitution, in another word the majority parts of Afghanistans 2004 Constitution are on the base of liberalism. But in some parts it violates some of the elements of liberalism for instance; liberalism emphasizes on religious liberty which will conduce to secularism, but article three of Afghanistan Constitution rejects this clam and emphasized that no law can be enacted which is opposite of Islam religion. Same situation is exited for the individualism. Liberalism gives priority to individuals upon society, but Afghanistan constitution gives priority to society upon individual.
Keywords: Liberalism, Afghanistan, Constitution, Boon agreement