The invention discloses a toothbrush, namely a cross toothbrush. The cross toothbrush consists of a toothbrush handle and a toothbrush head, wherein the toothbrush head has unique and novel structure which is mainly shown on a hair body (1), a circular moving belt (8) and a stretching well (10). In order to solve the problems that the cleaning effect is poor if the teeth are brushed transversely when a common toothbrush is used and the common toothbrush is inconvenient and difficultly kept if the teeth are brushed longitudinally and the problems of the tooth brushing habit, feeling (noise and vibration), price and the like when an electric toothbrush is used, the invention provides the toothbrush. The toothbrush is characterized in that: the bristle furthest moves longitudinally without any external force under the condition of keeping the original convenience and the habit of saw dragging type (transverse push and pull) tooth brushing to fulfill the purpose of brushing the teeth along the teeth slits, so that the teeth are cleaned more thoroughly; and in addition, the toothbrush has the effect on acceleration, so that the tooth brushing efficiency is higher, and points with high stress can be buffered, dispersed and dodged to avoid injuring the teeth and the gums. Therefore, the purpose of better cleaning and protecting the oral cavity is fulfilled.