The present invention aims to provide a toothbrush that can obtain good handleability in a child’s oral cavity and includes a handle body (5) including a bristle-implanted portion (11) formed of a plurality of fiber bundles (7), a head portion (2) in which the bristle-implanted portion is provided on a bristle-implanted surface (2a), a neck potion (3), and a handle portion (4). In a front view, the length of the neck portion is 15 mm or more and 35 mm or less, the total length of the head portion and the neck portion is 28 mm or more and 68 mm or less, and the width of the neck portion is 4 mm or more and 6 mm or less. In a side view, the thickness of the head portion is 2 mm or more and 4 mm or less. In the front view, the distance between a second position which is 20 mm from a first position located at a border between the neck portion and the head portion and an edge line of a finger grip portion is 4 mm or more and 22 mm or less. The difference of the thickness between the second position and the edge line of the finger grip portion in the side view is 3 mm or more and 9 mm or less.本發明的目的在於提供一種於兒童的口腔內獲得良好操作性的牙刷。包括：植毛部（11），包含多個毛束（7）；以及柄體（5），具有於植毛面（2a）上設置有植毛部的頭部（2）、頸部（3）及柄部（4）。正視時，頸部的長度為15 mm以上且35 mm以下，頭部與頸部的合計長度為28 mm以上且68 mm以下，頸部的寬度為4 mm以上且6 mm以下，側視時，頭部的厚度為2 mm以上且4 mm以下，正視時自位於頸部與頭部的邊界的第1位置朝柄部側移動20 mm的第2位置與手指接觸部的稜線的位置之間的距離為4 mm以上且22 mm以下，第2位置與手指接觸部的稜線的位置的側視時的厚度之差為3 mm以上且9 mm以下。
