Interdental cleaning tool

An interdental cleaning tool comprising:

• a cleaning tool body that is made of a synthetic resin, and includes a grip portion that is capable of being gripped with fingers of a user and a shaft portion that extends in one direction from the grip portion;
• and
• a cleaning portion configured to clean between teeth, covering a leading end of the shaft portion, and made of an elastomer,
• wherein the shaft portion includes a first region that continues from a leading end of the grip portion and a second region that continues from the leading end of the first region,
• the first region is formed in the shape of a substantially triangle, and the second region is formed in the shape of a rod,
• a length in the second region from the first region to the cleaning portion is shorter than the first region,
• a flexural strength of the interdental cleaning tool, measured as defined by JIS K7171, is 90 to 175 MPa,
• a modulus of elasticity in bending of the interdental cleaning tool, measured as defined by JIS K7171, is 4600 to 8500 MPa, and
• wherein Y>−0.07X+3.3 is satisfied,
• where Y is a maximum torque value (N·cm) when the grip portion is rotated at a rotational speed of 10 rpm about a position located 15 mm away from a leading end of the cleaning portion, and X is a rotational angle (degrees) when the maximum torque value is measured.