PURPOSE: To easily push the protruded part of a brush into an adjacent face between teeth, a narrow space between teeth and gums, the contact part between the gums and the inside of lips, etc., by inclining downward symmetrically both brush face sides in the protruded middle to the right and left sides from the short axis horizontal plane with the same height as the protruded middle and making an inclined construction of a stage or a plane in a roof form at the tooth brush.

CONSTITUTION: The central protruded upper face width of the brush face of a roof form inclined tooth brush is made to have a central protruded part 1 of a flat tooth brush face with 1/10-6/10 in accordance with the required function of this tooth brush. And the inclined part 2 of both brush side faces is made to form one stage or multi-stages or inclined planes. And the sides of tooth brush are made of fibers 3 of the brush sides erecting upright. The length of fibers of the sides changes according to the inclined angle of the inclined part 2 of the brush face.