Abstract. This short note is a continuous work of our previous paper [SW], where we were mainly concerned with the BMO theory of the universal Teichmüller space. We will endow the BMO-Teichmüller curve T b , the VMO-Teichmüller curve T v and the BMO-Teichmüller space T b with BMO manifold structures and prove that all these three spaces T b , T v and T b are contractible. We will also introduce a (new) extended BMO-Teichmüller spaceT b and endow it with BMO manifold structures.