A toothbrush which comprises an elongated handle including a U-shaped head coaxial with a front end of the handle. The head is provided with two opposite bristles-carrying portions located to opposite sides of an axis of the head and each of the portions has a front edge which is inclined at an acute angle to the axis. The toothbrush further includes a plurality of bristle tufts which are spaced from each other inwardly from the bristle-carrying portions and are arranged in a first plurality of rows which is substantially parallel to the front edge and in a second plurality of rows parallel to the axis. The ends of the bristles in the second plurality of rows on the opposite bristles-carrying portions are arranged to define an acute gap therebetween.