Traditional art is often left out by globalization which offers new types of popular culture. As a result, the local culture of a nation slowly began to be abandoned by its supporting community. One of the regional arts that 'lives unwillingly dead do not want to' is the traditional theater of mendu in West Kalimantan. Moving on from these concerns, TiraiBudayaart gallery was formed by artists and community leaders who live in Sungai Duri 1, Sungai Kunyit District, Mempawah Regency, of West Kalimantan. This art gallery strives to preserve their unique culture. Its activities include inviting the younger generation to revive the traditional theater of mendu. The purpose of this study is to describe the role of the TiraiBudaya art gallery in an effort to preserve the traditional theater of West Kalimantan. The method is used is descriptive qualitative, form case study approach. The results of the study were in the form of a description of the role of the TiraiBudayaart gallery in an effort to preserve the traditional theater of mendu as a hereditary heritage which became the cultural treasure of West Kalimantan.