TOOTHBRUSH

Provided is a toothbrush with which operability of a handle portion and operability inside the oral cavity can be ensured. In this toothbrush (1), which is provided with a bristle setting portion (11), a head portion (12), a neck portion (13), and a handle portion (14), the thickness t of the head portion (12) is 2.0-4.0 mm, inclusive, the minimum width W1 and minimum thickness D1 of the neck portion (13) are 3.0-4.5 mm, inclusive, the angle θ formed by a straight line N, which links a center point in the thickness direction of the handle portion (14) at a gripping center position of the toothbrush (1) and a center point in the thickness direction of the head portion (12) at a center position of the bristle setting portion (11), and a plane, which constitutes a bristle setting surface (12a), is 5.0-10.0 degrees, inclusive, and the distance h between the center point in the thickness direction of the handle portion (14) and the plane P is 6.0-12.0 mm, inclusive.