The present invention relates to a toothbrush having needle-shaped bristles on the head portion and is configured in such a manner that the differences in height between the longer bristles and the shorter bristles is 1 to 4 mm, the end points of the longer bristles are 0.01 to 0.03 mm in diameter, the end points of the shorter bristles are 0.03 to 0.08 mm in diameter, the taper lengths of the longer bristles are 4 to 8 mm, the taper lengths of the shorter bristles are 2 to 6 mm, and the differences in taper length between the longer bristles and the shorter bristles is 1 to 4 mm. The toothbrush according to the present invention provides the superior teeth and gum contact force unique to a toothbrush having needle-shaped bristles and at the same time also provides superior cleaning performance for the surface of teeth thanks to the action of the shorter bristles having relatively large diameters at end points and relatively short taper lengths. In addition, the wearing-out of an end portion of the bristles is delayed thanks to the shorter bristles so that the effect of prolonging the lifespan of the toothbrush is provided.