Providing a formed rotary cutting tool that restrains occurrence of breakage.
At least a first valley portion 44 as a neck portion in which a cutting edge diameter of a peripheral cutting edge 38 is locally minimized is provided with a roughing portion 58b as a fine roughing portion that is different in characteristics from a roughing portion 58a provided in a portion or portions other than the above-described at least the first valley portion 44. For example, where the roughing portion 58b provided in at least first valley portion 44 has characteristics that make cutting chips small, it is possible to restrain clogging of the cutting chips in at least first valley portion 44 and accordingly to advantageously restrain occurrence of breakage. That is, it is possible to provide the christmas-tree cutter 30 capable of restraining occurrence of the breakage.