Machine tool

A machine tool for machining a work by relative movement of a tool and the work, comprising:

• a spindle supporting side structure that is erected on a floor surface, for supporting movably a spindle having a tool mounted thereon along X-axis, Y-axis and Z-axis directions that are orthogonal to each other, said spindle supporting side structure having a rear bed provide on a floor surface, right and left columns erected on the rear bed, and a cross beam connecting the upper end of said right column and the upper end of said left column;
• and
• a work supporting side structure for supporting a work, said work supporting side structure having a front bed installed on the floor surface in opposition to said spindle supporting side structure;
• and
• a table provided on said front bed, and adapted to fix a pallet with the work attached thereto;
• and
• a plurality of interconnection members for connecting to each other the cross beam of said spindle supporting side structure and an upper part of the table of said front bed of said work supporting side structure and for constraining the spindle supporting side structure and work supporting side structure;
• wherein the interconnection members consist of two interconnection members spaced apart from each other;
• and
• wherein the interconnection members are formed in an arched shape, and connect the cross beam and an upper part of the table which is lower than said cross beam.