Provided is a polygonal toothbrush that enables bristles to more easily enter spaces between teeth to remove plaque, and as a consequence, can have a preventive effect on periodontal disease and gingivitis, as well as a massaging effect on gums and the like. This toothbrush is characterized in that a rotating-shaft receiving shaft of a brush material (1) is fitted and attached to a rotating shaft (9) provided on a handle part (13), and a guide plate that guides the rotation of the rotating-shaft receiving shaft is provided on the handle part (13) such that the friction resistance between the rotating shaft (9), the rotating-shaft receiving shaft, and the guide plate can be varied or the brush material (1) is attached, at a rotating-shaft receiving hole thereof, to the rotating shaft (9) provided on the handle part (13) such that the friction resistance between the rotating shaft and the rotating-shaft receiving hole of the brush material can be varied.【課題】毛先が歯間の隙間に容易に入り易くなり、歯垢除去が期待できることにより、その効果として、歯周病及び歯肉炎予防効果や、歯茎等のマッサージ効果も期待可能な多角形歯ブラシを提供する。【解決手段】柄部13に設けた回転軸9にブラシ材1を,その回転軸挿入軸を嵌めて取り付け、かつ回転軸挿入軸の回転をガイドするガイド板を柄部13に設けてなり、回転軸9と回転軸挿入軸とガイド板との間の摩擦抵抗を可変可能に、また、柄部13に設けた回転軸9にブラシ材1をその回転軸挿通穴において取り付け、前記回転軸とブラシ材の回転軸挿通穴との間の摩擦抵抗を可変可能に構成したことを特徴とする歯ブラシ。【選択図】図14
