A tool main body to which an insert is attachable, in which the tool main body is made of sintered metal material, and the sintered metal material includes a parent phase made of a metal and a plurality of pores present in the parent phase.

A rotary cutting tool, which is excellent in defect resistance and has a stable lifespan, includes a rake surface composed of one surface, a cutting edge angle that is larger than 0 and smaller than 90, a true rake angle that is not smaller than 42 and not larger than 13, and a major cutting edge inclination angle that is not smaller than 5 and smaller than +5. A wiper insert is preferably formed in a rounded convex shape.