An interdental cleaning tool capable of reducing possibility of a cleaning portion being detached from a shaft portion includes a base portion including a shaft portion (20) having a shape insertable in an interdental space, and a cleaning portion (50) that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The base portion further includes a protruding portion (40) that protrudes from a covered portion (22) in a direction intersecting the shaft portion (20), the covered portion (22) being a portion of the shaft portion (20) and covered by the cleaning portion (50).