Cutting device of web member including tow

A cutting device of a web member including a tow which conveys a continuous web member intermittently and, while the continuous web member has stopped being conveyed, makes a disk-shaped rotary blade member rotate about a rotation axis along the machine direction while makes it reciprocate in a perpendicularly intersecting direction which perpendicularly intersects the machine direction so as to cut the continuous web member into a predetermined product length, which cutting device is provided with

• a movement mechanism which moves together with said rotary blade member,
• a guide mechanism which is immovably fastened and which guides reciprocating movement of said movement mechanism, and
• a bearing which is placed between said guide mechanism and said movement mechanism to enable smooth movement of said movement mechanism with respect to said guide mechanism and, furthermore, is provided with
• a waste removing device which is attached to said movement mechanism and which blocks entry of fiber waste which is produced when cutting the continuous web member to the inside of said bearing by removing fiber waste which has deposited on said guide mechanism from said guide mechanism.