Cutter body

Provided is a tool body in which a cutting insert is easy to replace. A tool body (3) to which a replaceable cutting insert (2) is fixed is provided with an insert mount (5) provided on a first surface (421) of the tool body (3), a clamping member (6) that restrains the cutting insert (2) placed on the insert mount (5), and an operating member (7) that operates the clamping member (6). The operation member (7) is capable of lowering the clamping member (6) from the first surface (421) toward a second surface (422) of the tool body (3) located on the opposite side of the first surface (421), and is capable of raising the clamping member (6) from the second surface (422) toward the first surface (421). The clamping member (6) has a hook section (61) that comes into contact with a reduced diameter section (292) formed on the inner peripheral surface of the mounting hole (29) of the cutting insert (2) in a state in which the clamping member (6) is lowered. 提供一种容易更换切削刀片的刀具主体。固定可更换的切削刀片2的刀具主体3包括设置于刀具主体3的第一面421的刀片安装