In this paper, we propose the extendible Tangible User Interface and investigate usages and the possibilities of extendible user interface. Recently the shape changing user interface is focused on the field of Tangible User Interface. It can be changed its shape to express the digital data and physical interactions. Based on this idea, we are making Unframes: the extendible module-based user interface that can be assembled. Unframes consists of 4 cm cubic modules that can extend 4 cm in one direction. Users can make their own user interface like a visualizer, a data manager and a controller by assembling these modules. Each module have a date and synchronize each other, so it’s possible to recognize the existence of data physically. This research is a work in progress. Now on, we investigated the interfaces with only 4 units and we suppose there are still design spaces to expand and study. In the poster sessions, we will present the Unframes and investigations of its usages.