There is provided a tool holder capable of attaching a plurality of tools to one tool holder, and easily adjusting these tools in a positional relation suitable for work machining. The tool holder comprises a holder body 201 attached to a tool rest 160, a plurality of surfaces 202 and 203 formed around the holder body 201, holders 210 and 220 attached to the surfaces 202 and 203 and having tools for machining the work attached thereto, toothed portions 208 and 209 of tooth-shaped rows formed in a predetermined direction on the surfaces 202 and 203, engaging portions 211 and 221 formed on the surfaces of the holders attached to the surfaces 202 and 203, and engaged with the toothed portions to position the holders in predetermined positions of the surfaces 202 and 203, and attaching means 240 and 250 for attaching the holders to the holder body in engaging states between the toothed portions and the engaging portions.