Abstract: The invention features a so-called transversal toothbrush to ensure greater brushing efficiency between the teeth and at the neck level of the teeth. It is characterized in that the direction of the handle (2) is preferably perpendicular relative to the longitudinal direction of the brush body (1). The handle is either connected fixedly with the brush body but with a deformation region (6) for transversal or longitudinal use, or it is mounted movably on the brush body. A mechanism for blocking it in position are provided on the brush body by a truncated cone (10) topped by a shaft (13) and opposite, on the handle, by an apertured hood (16) comprising two lugs (17) and part of a cylinder (18).