To provide a machine tool for compound machining capable of easily changing arrangement for a line boring bar storing magazine, even during machining, without receiving restrictions on the storing number of line boring bars.

This machine tool 1 for compound machining is provided with a main spindle head 6 rotatably supporting a main spindle 16 and movable in a Z-axis direction and a Y-axis direction relative to a workpiece, the line boring bar storing magazine 7 which is installed in a machine main body 5, is provided at the outside of a splash guard 21 for covering a machining region 20 and is capable of storing the line boring bar 3, a line boring bar transfer means 8 for transferring the line boring bar 3 between a carry-out/in position P1 and a line boring bar replacing position P2, a tool magazine capable of storing a tool, and an automatic tool replacing device for replacing the tool between the tool magazine and the main spindle 16.